"At home."

"Are you sure that you did not go out?"

"Absolutely sure. And I am also sure that I have never been to the Cafe du Pont-Neuf, of which I had never even heard."

"Good. Next question. Why, when you learned all about this business, did you not go to the Prefect of Police or the examining magistrate? It would have been simpler for you to give yourself up and tell the exact truth than to engage in this unequal fight."

"I was thinking of doing so. But I at once realized that the plot hatched against me was so clever that no bare statement of the truth would have been enough to convince the authorities. They would never have believed me. What proof could I supply? None at all—whereas, on the other hand, the proofs against us were overwhelming and undeniable. Were not the marks of the teeth evidence of Marie's undoubted guilt? And were not my silence, my flight, the shooting of Chief Inspector Ancenis so many crimes? No, if I would rescue Marie, I must remain free."

"But she could have spoken herself?"

"And confessed our love? Apart from the fact that her womanly modesty would have prevented her, what good would it have done? On the contrary, it meant lending greater weight to the accusation. That was just what happened when Hippolyte Fauville's letters, appearing one by one, revealed to the police the as yet unknown motives of the crimes imputed to us. We loved each other."

"How do you explain the letters?"

"I can't explain them. We did not know of Fauville's jealousy. He kept it to himself. And then, again, why did he suspect us? What can have put it into his head that we meant to kill him? Where did his fears, his nightmares, come from? It is a mystery. He wrote that he had letters of ours in his possession: what letters?"

"And the marks of the teeth, those marks which were undoubtedly made by Mme. Fauville?"

"I don't know. It is all incomprehensible."

"You don't know either what she can have done after leaving the opera between twelve and two in the morning?"

"No. She was evidently lured into a trap. But how and by whom? And why does she not say what she was doing? More mystery."

"You were seen that evening, the evening of the murders, at Auteuil station. What were you doing there?"

"I was going to the Boulevard Suchet and I passed under Marie's windows. Remember that it was a Wednesday. I came back on the following Wednesday, and, still knowing nothing of the tragedy or of Marie's arrest, I came back again on the second Wednesday, which was the evening on which you found out where I lived and informed Sergeant Mazeroux against me."

"Another thing. Did you know of the Mornington inheritance?"

"No, nor Florence either; and we have every reason to think that Marie and her husband knew no more about it than we did."

"That barn at Damigni: was it the first time that you had entered it?"

"Yes; and our astonishment at the sight of the two skeletons hanging from the rafters equalled yours."

Don Luis was silent. He cast about for a few seconds longer to see if he had any more questions to ask. Then he said:

"That is all I wanted to know. Are you, on your side, certain that everything that is necessary has been said?"

"Yes."

"This is a serious moment. It is possible that we may not meet again. Now you have not given me a single proof of your statements."

"I have told you the truth. To a man like yourself, the truth is enough. As for me, I am beaten. I give up the struggle, or, rather, I place myself under your orders. Save Marie."

"I will save the three of you," said Perenna. "The fourth of the mysterious letters is to make its appearance to-morrow: that leaves ample time for us to lay our heads together and study the matter fully. And to-morrow evening I shall go there and, with the help of all that you have told me, I shall prove the innocence of you all. The essential thing is to be present at the meeting on the twenty-fifth of May."

"Please think only of Marie. Sacrifice me, if necessary. Sacrifice Florence even. I am speaking in her name as well as my own when I tell you that it is better to desert us than to jeopardize the slightest chance of success."

"I will save the three of you," Perenna repeated.

He pushed the door ajar and, after listening outside, said:

"Don't move. And don't open the door to anybody, on any pretext whatever, before I come to fetch you. I shall not be long."

He locked the door behind him and went down to the first floor. He did not feel those high spirits which usually cheered him on the eve of his great battles. This time, Florence Levasseur's life and liberty were at stake; and the consequences of a defeat seemed to him worse than death.

Through the window on the landing he saw the detectives guarding the courtyard. He counted six of them. And he also saw the deputy chief at one of the windows of his study, watching the courtyard and keeping in touch with his detectives.

"By Jove!" he thought, "he's sticking to his post. It will be a tough job. He suspects something. However, let's make a start!"

He went through the drawing-room and entered his study. Weber saw him. The two enemies were face to face.

There was a few seconds' silence before the duel opened, the duel which was bound to be swift and vigorous, without the least sign of weakness or distraction on either side. It could not last longer than three minutes.

The deputy chief's face bore an expression of mingled joy and anxiety. For the first time he had permission, he had orders, to fight that accursed Don Luis, against whom he had never yet been able to satisfy his hatred. And his delight was all the greater because he held every trump, whereas Don Luis had put himself in the wrong by defending Florence Levasseur and tampering with the girl's portrait. On the other hand, Weber did not forget that Don Luis was identical with Arsene Lupin; and this consideration caused him a certain uneasiness. He was obviously thinking:

"The least blunder, and I'm done for."

He crossed swords with a jest.

"I see that you were not in Mlle. Levasseur's lodge, as your man pretended."

"My man spoke in accordance with my instructions, I was in my bedroom, upstairs. But I wanted to finish the job before I came down."

"And is it done?"

"It's done. Florence Levasseur and Gaston Sauverand are in my room, gagged and bound. You have only to accept delivery of the goods."

"Gaston Sauverand!" cried Weber. "Then it was he who was seen coming in?"

"Yes. He was simply living with Florence Levasseur, whose lover he is."

"Oho!" said the deputy chief, in a bantering tone. "Her lover!"

"Yes; and when Sergeant Mazeroux brought Florence Levasseur to my room, to question her out of hearing of the servants, Sauverand, foreseeing the arrest of his mistress, had the audacity to join us. He tried to rescue her from our hands."

"And you checkmated him?"

"Yes."

It was clear that the deputy chief did not believe one word of the story. He knew through M. Desmalions and Mazeroux that Don Luis was in love with Florence; and Don Luis was not the man even through jealousy to hand over a woman whom he loved. He increased his attention.

"Good business!" he said. "Take me up to your room. Was it a hard struggle?"

"Not very. I managed to disarm the scoundrel. All the same, Mazeroux got stabbed in the thumb."

"Nothing serious?"

"Oh, dear, no; but he has gone to have his wound dressed at the chemist's."

The deputy chief stopped, greatly surprised.

"What! Isn't Mazeroux in your room with the two prisoners?"

"I never told you that he was."

"No, but your butler—"

"The butler made a mistake. Mazeroux went out a few minutes before you came."

"It's funny," said Weber, watching Don Luis closely, "but my men all think he's here. They haven't seen him go out."

"They haven't seen him go out?" echoed Don Luis, pretending to feel anxious. "But, then, where can he be? He told me he wanted to have his thumb seen to."

The deputy chief was growing more and more suspicious. Evidently Perenna was trying to get rid of him by sending him in search of the sergeant.

"I will send one of my men," he said. "Is the chemist's near?"

"Just around the corner, in the Rue de Bourgogne. Besides, we can telephone."

"Oh, we can telephone!" muttered Weber.

He was quite at a loss and looked like a man who does not know what is going to happen next. He moved slowly toward the instrument, while barring the way to Don Luis to prevent his escaping. Don Luis therefore retreated to the telephone box, as if forced to do so, took down the receiver with one hand, and, calling, "Hullo! Hullo! Saxe, 2409," with the other hand, which was resting against the wall, he cut one of the wires with a pair of pliers which he had taken off the table as he passed.

"Hullo! Are you there? Is that 2409? Are you the chemist?... Hullo!... Sergeant Mazeroux of the detective service is with you, isn't he? Eh? What? What do you say? But it's too awful! Are you sure? Do you mean to say the wound is poisoned?"

Without thinking what he was doing, the deputy chief pushed Don Luis aside and took hold of the receiver. The thought of the poisoned wound was too much for him.

"Are you there?" he cried, keeping an eye on Don Luis and motioning to him not to go away. "Are you there? ... Eh? ... It's Deputy Chief Weber, of the detective office, speaking.... Hullo! Are you there? ... I want to know about Sergeant Mazeroux. ... Are you there?. . . Oh, hang it, why don't you answer!"

Suddenly he let go the instrument, looked at the wires, perceived that they had been cut, and turned round, showing a face that clearly expressed the thought in his mind.

"That's done it. I've been tricked!"

Perenna was standing a couple of yards behind him, leaning carelessly against the woodwork of the arch, with his left hand passed between his back and the woodwork. He was smiling, smiling pleasantly, kindly, and genially:

"Don't move!" he said, with a gesture of his right hand.

Weber, more frightened by that smile than he would have been by threats, took good care not to move.

"Don't move," repeated Don Luis, in a very queer voice. "And, whatever you do, don't be alarmed. You shan't be hurt, I promise you. Just five minutes in a dark cell for a naughty little boy. Are you ready? One two, three! Bang!"

He stood aside and pressed the button that worked the iron curtain. The heavy panel came crashing to the floor. The deputy chief was a prisoner.

"That's a hundred millions gone to Jericho," grinned Don Luis. "A pretty trick, but a bit expensive. Good-bye, Mornington inheritance! Good-bye, Don Luis Perenna! And now, my dear Lupin, if you don't want Weber to take his revenge, beat a retreat and in good order. One, two; left, right; left, right!"

As he spoke, he locked, on the inside, the folding doors between the drawing-room and the first-floor anteroom; then, returning to his study, he locked the door between this room and the drawing-room.

The deputy chief was banging at the iron curtain with all his might and shouting so loud that they were bound to hear him outside through the open window.

"You're not making half enough noise, deputy!" cried Don Luis. "Let's see what we can do."

He took his revolver and fired off three bullets, one of which broke a pane. Then he quickly left his study by a small, massive door, which he carefully closed behind him. He was now in a secret passage which ran round both rooms and ended at another door leading to the anteroom. He opened this door wide and was thus able to hide behind it.

Attracted by the shots and the noise, the detectives were already rushing through the hall and up the staircase. When they reached the first floor and had gone through the anteroom, as the drawing-room doors were locked, the only outlet open to them was the passage, at the end of which they could hear the deputy shouting. They all six darted down it.

When the last of them had vanished round the bend in the passage, Don Luis softly pushed back the door that concealed him and locked it like the rest. The six detectives were as safely imprisoned as the deputy chief.

"Bottled!" muttered Don Luis. "It will take them quite five minutes to realize the situation, to bang at the locked doors, and to break down one of them. In five minutes we shall be far away."

He met two of his servants running up with scared faces, the chauffeur and the butler. He flung each of them a thousand-franc note and said to the chauffeur:

"Set the engine going, there's a sportsman, and let no one near the machine to block my way. Two thousand francs more for each of you if I get off in the motor. Don't stand staring at me like that: I mean what I say. Two thousand francs apiece: it's for you to earn it. Look sharp!"

He himself went up the second flight without undue haste, remaining master of himself. But, on the last stair, he was seized with such a feeling of elation that he shouted:

"Victory! The road is clear!"

The boudoir door was opposite. He opened it and repeated:

"Victory! But there's not a second to lose. Follow me."

He entered. A stifled oath escaped his lips.

The room was empty.

"What!" he stammered. "What does this mean? They're gone.... Florence—"

Certainly, unlikely though it seemed, he had hitherto supposed that Sauverand possessed a false key to the lock. But how could they both have escaped, in the midst of the detectives? He looked around him. And then he understood.

In the recess containing the window, the lower part of the wall, which formed a very wide box underneath the casement, had the top of its woodwork raised and resting against the panes, exactly like the lid of a chest. And inside the open chest he saw the upper rungs of a narrow descending ladder.

In a second, Don Luis conjured up the whole story of the past: Count Malonyi's ancestress hiding in the old family mansion, escaping the search of the perquisitors, and in this way living throughout the revolutionary troubles. Everything was explained. A passage contrived in the thickness of the wall led to some distant outlet. And this was how Florence used to come and go through the house; this was how Gaston went in and out in all security; and this also was how both of them were able to enter his room and surprise his secrets.

"Why not have told me?" he wondered. "A lingering suspicion, I suppose—"

But his eyes were attracted by a sheet of paper on the table. With a feverish hand, Gaston Sauverand had scribbled the following lines in pencil:

"We are trying to escape so as not to compromise you. If we are caught, it can't be helped. The great thing is that you should be free. All our hopes are centred in you."

Below were two words written by Florence: "Save Marie."

"Ah," he murmured, disconcerted by the turn of events and not knowing what to decide, "why, oh, why did they not obey my instructions? We are separated now—"

Downstairs the detectives were battering at the door of the passage in which they were imprisoned. Perhaps he would still have time to reach his motor before they succeeded in breaking down the door. Nevertheless, he preferred to take the same road as Florence and Sauverand, which gave him the hope of saving them and of rescuing them in case of danger.

He therefore stepped over the side of the chest, placed his foot on the top rung and went down. Some twenty bars brought him to the middle of the first floor. Here, by the light of his electric lantern, he entered a sort of low, vaulted tunnel, dug, as he thought, in the wall, and so narrow that he could only walk along it sideways.

Thirty yards farther there was a bend, at right angles; and next, at the end of another tunnel of the same length, a trapdoor, which stood open, revealing the rungs of a second ladder. He did not doubt that the fugitives had gone this way.

It was quite light at the bottom. Here he found himself in a cupboard which was also open and which, on ordinary occasions, must have been covered by curtains that were now drawn. This cupboard faced a bed that filled almost the whole space of an alcove. On passing through the alcove and reaching a room from which it was separated only by a slender partition, to his great surprise, he recognized Florence's sitting-room.

This time, he knew where he was. The exit, which was not secret, as it led to the Place du Palais-Bourbon, but nevertheless very safe, was that which Sauverand generally used when Florence admitted him.

Don Luis therefore went through the entrance hall and down the steps and, a little way before the pantry, came upon the cellar stairs. He ran down these and soon recognized the low door that served to admit the wine-casks. The daylight filtered in through a small, grated spy-hole. He groped till he found the lock. Glad to have come to the end of his expedition, he opened the door.

"Hang it all!" he growled, leaping back and clutching at the lock, which he managed to fasten again.

Two policemen in uniform were guarding the exits two policemen who had tried to seize him as he appeared.

Where did those two men come from? Had they prevented the escape of Sauverand and Florence? But in that case Don Luis would have met the two fugitives, as he had come by exactly the same road as they.

"No," he thought, "they effected their flight before the exit was watched. But, by Jove! it's my turn to clear out; and that's not easy. Shall I let myself be caught in my burrow like a rabbit?"

He went up the cellar stairs again, intending to hasten matters, to slip into the courtyard through the outhouses, to jump into his motor, and to clear a way for himself. But, when he was just reaching the yard, near the coach-house, he saw four detectives, four of those whom he had imprisoned, come up waving their arms and shouting. And he also became aware of a regular uproar near the main gate and the porter's lodge. A number of men were all talking together, raising their voices in violent discussion.

Perhaps he might profit by this opportunity to steal outside under cover of the disorder. At the risk of being seen, he put out his head. And what he saw astounded him.

Gaston Sauverand stood with his back to the wall of the lodge, surrounded by policemen and detectives who pushed and insulted him. The handcuffs were on his wrists.

Gaston Sauverand a prisoner! What had happened between the two fugitives and the police?

His heart wrung with anguish, he leaned out still farther. But he did not see Florence. The girl had no doubt succeeded in escaping.

Weber's appearance on the steps and the deputy chief's first words confirmed his hopes. Weber was mad with rage. His recent captivity and the humiliation of his defeat exasperated him.

"Ah!" he roared, as he saw the prisoner. "There's one of them, at any rate! Gaston Sauverand! Choice game, that!... Where did you catch him?"

"On the Place du Palais-Bourbon," said one of the inspectors. "We saw him slinking out through the cellar door."

"And his accomplice, the Levasseur girl?"

"We missed her, Deputy Chief. She was the first out."

"And Don Luis? You haven't let him leave the house, I hope? I gave orders."

"He tried to get out through the cellar door five minutes after."

"Who said so?"

"One of the men in uniform posted outside the door."

"Well?"

"The beggar went back into the cellar."

Weber gave a shout of delight.

"We've got him! And it's a nasty business for him! Charge of resisting the police!... Complicity ... We shall be able to unmask him at last. Tally-ho, my lads, tally-ho! Two men to guard Sauverand, four men on the Place du Palais-Bourbon, revolver in hand. Two men on the roof. The rest stick to me. We'll begin with the Levasseur girl's room and we'll take his room next. Hark, forward, my lads!"

Don Luis did not wait for the enemies' attack. Knowing their intentions, he beat a retreat, unseen, toward Florence's rooms. Here, as Weber did not yet know the short cut through the outhouses, he had time to make sure that the trapdoor was in perfect working order, and that there was no reason why they should discover the existence of a secret cupboard at the back of the alcove, behind the curtains of the bed.

Once inside the passage, he went up the first staircase, followed the long corridor contrived in the wall, climbed the ladder leading to the boudoir, and, perceiving that this second trapdoor fitted the woodwork so closely that no one could suspect anything, he closed it over him. A few minutes later he heard the noise of men making a search above his head.

And so, on the twenty-fourth of May, at five o'clock in the afternoon, the position was as follows: Florence Levasseur with a warrant out against her, Gaston Sauverand in prison, Marie Fauville in prison and refusing all food, and Don Luis, who believed in their innocence and who alone could have saved them, Don Luis was being blockaded in his own house and hunted down by a score of detectives.

As for the Mornington inheritance, there could be no more question of that, because the legatee, in his turn, had set himself in open rebellion against society.

"Capital!" said Don Luis, with a grin. "This is life as I understand it. The question is a simple one and may be put in different ways. How can a wretched, unwashed beggar, with not a penny in his pocket, make a fortune in twenty-four hours without setting foot outside his hovel? How can a general, with no soldiers and no ammunition left, win a battle which he has lost? In short, how shall I, Arsene Lupin, manage to be present to-morrow evening at the meeting which will be held on the Boulevard Suchet and to behave in such a way as to save Marie Fauville, Florence Levasseur, Gaston Sauverand, and my excellent friend Don Luis Perenna in the bargain?"

Dull blows came from somewhere. The men must be hunting the roofs and sounding the walls.

Don Luis stretched himself flat on the floor, hid his face in his folded arms and, shutting his eyes, murmured:

"Let's think."



CHAPTER TWELVE

"HELP!"

When Lupin afterward told me this episode of the tragic story, he said, not without a certain self-complacency:

"What astonished me then, and what astonishes me still, as one of the most amazing victories on which I am entitled to pride myself, is that I was able to admit Sauverand and Marie Fauville's innocence on the spot, as a problem solved once and for all. It was a first-class performance, I swear, and surpassed the most famous deductions of the most famous investigators both in psychological value and in detective merit.

"After all, taking everything into account, there was not the shadow of a fresh fact to enable me to alter the verdict. The charges accumulated against the two prisoners were the same, and were so grave that no examining magistrate would have hesitated for a second to commit them for trial, nor any jury to bring them in guilty. I will not speak of Marie Fauville: you had only to think of the marks of her teeth to be absolutely certain. But Gaston Sauverand, the son of Victor Sauverand and consequently the heir of Cosmo Mornington—Gaston Sauverand, the man with the ebony walking-stick and the murderer of Chief Inspector Ancenis—was he not just as guilty as Marie Fauville, incriminated with her by the mysterious letters, incriminated by the very revelation of the husband whom they had killed?

"And yet why did that sudden change take place in me?" he asked. "Why did I go against the evidence? Why did I credit an incredible fact? Why did I admit the inadmissible? Why? Well, no doubt, because truth has an accent that rings in the ears in a manner all its own. On the one side, every proof, every fact, every reality, every certainty; on the other, a story, a story told by one of the three criminals, and therefore, presumptively, absurd and untrue from start to finish. But a story told in a frank voice, a clear, dispassionate, closely woven story, free from complications or improbabilities, a story which supplied no positive solution, but which, by its very honesty, obliged any impartial mind to reconsider the solution arrived at. I believed the story."

The explanation which Lupin gave me was not complete. I asked:

"And Florence Levasseur?"

"Florence?"

"Yes, you don't tell me what you thought. What was your opinion about her? Everything tended to incriminate her not only in your eyes, because, logically speaking, she had taken part in all the attempts to murder you, but also in the eyes of the police. They knew that she used to pay Sauverand clandestine visits at his house on the Boulevard Richard-Wallace. They had found her photograph in Inspector Verot's memorandum-book, and then—and then all the rest: your accusations, your certainties. Was all that modified by Sauverand's story? To your mind, was Florence innocent or guilty?"

He hesitated, seemed on the point of replying directly and frankly to my question, but could not bring himself to do so, and said:

"I wished to have confidence. In order to act, I must have full and entire confidence, whatever doubts might still assail me, whatever darkness might still enshroud this or that part of the adventure. I therefore believed. And, believing, I acted according to my belief."

Acting, to Don Luis Perenna, during those hours of forced inactivity, consisted solely in perpetually repeating to himself Gaston Sauverand's account of the events. He tried to reconstitute it in all its details, to remember the very least sentences, the apparently most insignificant phrases. And he examined those sentences, scrutinized those phrases one by one, in order to extract such particle of the truth as they contained.

For the truth was there. Sauverand had said so and Perenna did not doubt it. The whole sinister affair, all that constituted the case of the Mornington inheritance and the tragedy of the Boulevard Suchet, all that could throw light upon the plot hatched against Marie Fauville, all that could explain the undoing of Sauverand and Florence—all this lay in Sauverand's story. Don Luis had only to understand, and the truth would appear like the moral which we draw from some obscure fable.

Don Luis did not once deviate from his method. If any objection suggested itself to his mind, he at once replied:

"Very well. It may be that I am wrong and that Sauverand's story will not enlighten me on any point capable of guiding me. It may be that the truth lies outside it. But am I in a position to get at the truth in any other way? All that I possess as an instrument of research, without attaching undue importance to certain gleams of light which the regular appearance of the mysterious letters has shed upon the case, all that I possess is Gaston Sauverand's story. Must I not make use of it?"

And, once again, as when one follows a path by another person's tracks, be began to live through the adventure which Sauverand had been through. He compared it with the picture of it which he had imagined until then. The two were in opposition; but could not the very clash of their opposition be made to produce a spark of light?

"Here is what he said," he thought, "and there is what I believed. What does the difference mean? Here is the thing that was, and there is the thing that appeared to be. Why did the criminal wish the thing that was to appear under that particular aspect? To remove all suspicion from him? But, in that case, was it necessary that suspicion should fall precisely on those on whom it did?"

The questions came crowding one upon the other. He sometimes answered them at random, mentioning names and uttering words in succession, as though the name mentioned might be just that of the criminal, and the words uttered those which contained the unseen reality.

Then at once he would take up the story again, as schoolboys do when parsing and analyzing a passage, in which each expression is carefully sifted, each period discussed, each sentence reduced to its essential value.

* * * * *

Hours and hours passed. Suddenly, in the middle of the night, he gave a start. He took out his watch. By the light of his electric lamp he saw that it was seventeen minutes to twelve.

"So at seventeen minutes to twelve at night," he said, "I fathomed the mystery."

He tried to control his emotion, but it was too great; and his nerves were so immensely staggered by the trial that he began to shed tears. He had caught sight of the appalling truth, all of a sudden, as when at night one half sees a landscape under a lightning-flash.

There is nothing more unnerving than this sudden illumination when we have been groping and struggling in the dark. Already exhausted by his physical efforts and by the want of food, from which he was beginning to suffer, he felt the shock so intensely that, without caring to think a moment longer, he managed to go to sleep, or, rather, to sink into sleep, as one sinks into the healing waters of a bath.

When he woke, in the small hours, alert and well despite the discomfort of his couch, he shuddered on thinking of the theory which he had accepted; and his first instinct was to doubt it. He had, so to speak, no time.

All the proofs came rushing to his mind of their own accord and at once transformed the theory into one of those certainties which it would be madness to deny. It was that and nothing else. As he had foreseen, the truth lay recorded in Sauverand's story. And he had not been mistaken, either, in saying to Mazeroux that the manner in which the mysterious letters appeared had put him on the track of the truth.

And the truth was terrible. He felt, at the thought of it, the same fears that had maddened Inspector Verot when, already tortured by the poison, he stammered:

"Oh, I don't like this, I don't like the look of this!... The whole thing has been planned in such an infernal manner!"

Infernal was the word! And Don Luis remained stupefied at the revelation of a crime which looked as if no human brain could have conceived it.

For two hours more he devoted all his mental powers to examining the situation from every point of view. He was not much disturbed about the result, because, being now in possession of the terrible secret, he had nothing more to do but make his escape and go that evening to the meeting on the Boulevard Suchet, where he would show them all how the murder was committed.

But when, wishing to try his chance of escaping, he went up through the underground passage and climbed to the top of the upper ladder—that is to say, to the level of the boudoir—he heard through the trapdoor the voices of men in the room.

"By Jove!" he said to himself, "the thing is not so simple as I thought! In order to escape the minions of the law I must first leave my prison; and here is at least one of the exits blocked. Let's look at the other."

He went down to Florence's apartments and worked the mechanism, which consisted of a counterweight. The panel of the cupboard moved in the groove.

Driven by horror and hoping to find some provisions which enable him to withstand a siege without being reduced to famine, he was about to pass through the alcove, behind the curtains, when he was stopped short by a sound of footsteps. Some one had entered the room.

"Well, Mazeroux, have you spent the night here? Nothing new!"

Don Luis recognized the Prefect of Police by his voice; and the question put by the Prefect told him, first, that Mazeroux had been released from the dark closet where he had bound him up, and, secondly, that the sergeant was in the next room. Fortunately, the sliding panel had worked without the least sound; and Don Luis was able to overhear the conversation between the two men.

"No, nothing new, Monsieur le Prefet," replied Mazeroux.

"That's funny. The confounded fellow must be somewhere. Or can he have got away over the roof?"

"Impossible, Monsieur le Prefet," said a third voice, which Don Luis recognized as that of Weber, the deputy chief detective. "Impossible. We made certain yesterday, that unless he has wings—"

"Then what do you think, Weber?"

"I think, Monsieur le Prefet, that he is concealed in the house. This is an old house and probably contains some safe hiding-place—"

"Of course, of course," said M. Desmalions, whom Don Luis, peeping through the curtains, saw walking to and fro in front of the alcove. "You're right; and we shall catch him in his burrow. Only, is it really necessary?"

"Monsieur le Prefet!"

"Well, you know my opinion on the subject, which is also the Prime Minister's opinion. Unearthing Lupin would be a blunder which we should end by regretting. After all, he's become an honest man, you know; he's useful to us and he does no harm—"

"No harm, Monsieur le Prefet? Do you think so?" said Weber stiffly.

M. Desmalions burst out laughing.

"Oh, of course, yesterday's trick, the telephone trick! You must admit it was funny. The Premier had to hold his sides when I told him of it."

"Upon my word, I see nothing to laugh at!"

"No, but, all the same, the rascal is never at a loss. Funny or not, the trick was extraordinarily daring. To cut the telephone wire before your eyes and then blockade you behind that iron curtain! By the way, Mazeroux, you must get the telephone repaired this morning, so as to keep in touch with the office. Have you begun your search in these two rooms?"

"As you ordered, Monsieur le Prefet. The deputy chief and I have been hunting round for the last hour."

"Yes," said M. Desmalions, "that Florence Levasseur strikes me as a troublesome creature. She is certainly an accomplice. But what were her relations with Sauverand and what was her connection with Don Luis Perenna? That's what I should like to know. Have you discovered nothing in her papers?"

"No, Monsieur le Prefet," said Mazeroux. "Nothing but bills and tradesmen's letters."

"And you, Weber?"

"I've found something very interesting, Monsieur le Prefet."

Weber spoke in a triumphant tone, and, in answer to M. Desmalions's question, went on:

"This is a volume of Shakespeare, Monsieur le Prefet, Volume VIII. You will see that, contrary to the other volumes, the inside is empty and the binding forms a secret receptacle for hiding documents."

"Yes. What sort of documents?"

"Here they are: sheets of paper, blank sheets, all but three. One of them gives a list of the dates on which the mysterious letters were to appear."

"Oho!" said M. Desmalions. "That's a crushing piece of evidence against Florence Levasseur. And also it tells us where Don Luis got his list from."

Perenna listened with surprise: he had utterly forgotten this particular; and Gaston Sauverand had made no reference to it in his narrative. And yet it was a strange and serious detail. From whom had Florence received that list of dates?

"And what's on the other two sheets?" asked M. Desmalions.

Don Luis pricked up his ears. Those two other sheets had escaped his attention on the day of his interview with Florence in this room.

"Here is one of them," said Weber.

M. Desmalions took the paper and read:

"Bear in mind that the explosion is independent of the letters, and that it will take place at three o'clock in the morning."

"Yes," he said, "the famous explosion which Don Luis foretold and which is to accompany the fifth letter, as announced on the list of dates. Tush! We have plenty of time, as there have been only three letters and the fourth is due to-night. Besides, blowing up that house on the Boulevard Suchet would be no easy job, by Jove! Is that all?"

"Monsieur le Prefet," said Weber, producing the third sheet, "would you mind looking at these lines drawn in pencil and enclosed in a large square containing some other smaller squares and rectangles of all sizes? Wouldn't you say that it was the plan of a house?"

"Yes, I should."

"It is the plan of the house in which we are," declared Weber solemnly. "Here you see the front courtyard, the main building, the porter's lodge, and, over there, Mlle. Levasseur's lodge. From this lodge, a dotted line, in red pencil, starts zigzagging toward the main building. The commencement of this line is marked by a little red cross which stands for the room in which we are, or, to be more correct, the alcove. You will see here something like the design of a chimney, or, rather, a cupboard—a cupboard recessed behind the bed and probably hidden by the curtains."

"But, in that case, Weber," said M. Desmalions, "this dotted line must represent a passage leading from this lodge to the main building. Look, there is also a little red cross at the other end of the line."

"Yes, Monsieur le Prefet, there is another cross. We shall discover later for certain what position it marks. But, meanwhile, and acting on a mere guess, I have posted some men in a small room on the second floor where the last secret meeting between Don Luis, Florence Levasseur, and Gaston Sauverand was held yesterday. And, meanwhile, at any rate, we hold one end of the line and, through that very fact, we know Don Luis Perenna's retreat."

There was a pause, after which the deputy chief resumed in a more and more solemn voice:

"Monsieur le Prefet, yesterday I suffered a cruel outrage at the hands of that man. It was witnessed by our subordinates. The servants must be aware of it. The public will know of it before long. This man has brought about the escape of Florence Levasseur. He tried to bring about the escape of Gaston Sauverand. He is a ruffian of the most dangerous type. Monsieur le Prefet, I am sure that you will not refuse me leave to dig him out of his hole. Otherwise—otherwise, Monsieur le Prefet, I shall feel obliged to hand in my resignation."

"With good reasons to back it up!" said the Prefect, laughing. "There's no doubt about it; you can't stomach the trick of the iron curtain. Well, go ahead! It's Don Luis's own lookout; he's brought it on himself. Mazeroux, ring me up at the office as soon as the telephone is put right. And both of you meet me at the Fauvilles' house this evening. Don't forget it's the night for the fourth letter."

"There won't be any fourth letter, Monsieur le Prefet," said Weber.

"Why not?"

"Because between this and then Don Luis will be under lock and key."

"Oh, so you accuse Don Luis also of—"

Don Luis did not wait to hear more. He softly retreated to the cupboard, took hold of the panel and pushed it back without a sound.

So his hiding-place was known!

"By Jingo," he growled, "this is a bit awkward! I'm in a nice plight!"

He had run halfway along the underground passage, with the intention of reaching the other exit. But he stopped.

"It's not worth while, as the exit's watched. Well, let's see; am I to let myself be collared? Wait a bit, let's see—"

Already there came from the alcove below a noise of blows striking on the panel, the hollow sound of which had probably attracted the deputy chief's attention. And, as Weber was not compelled to take the same precautions as Don Luis, and seemed to be breaking down the panel without delaying to look for the mechanism, the danger was close at hand.

"Oh, hang it all!" muttered Don Luis. "This is too silly. What shall I do? Have a dash at them? Ah, if I had all my strength!"

But he was exhausted by want of food. His legs shook beneath him and his brain seemed to lack its usual clearness.

The increasing violence of the blows in the alcove drove him, in spite of all, toward the upper exit; and, as he climbed the ladder, he moved his electric lantern over the stones of the wall and the wood of the trapdoor. He even tried to lift the door with his shoulder. But he again heard a sound of footsteps above his head. The men were still there.

Then, consumed with fury and helpless, he awaited the deputy's coming.

A crash came from below; its echo spread through the tunnel, followed by a tumult of voices.

"That's it," he said to himself. "The handcuffs, the lockup, the cell! Good Lord, what luck—and what nonsense! And Marie Fauville, who's sure to do away with herself. And Florence—Florence—"

Before extinguishing his lantern, he cast its light around him for the last time.

At a couple of yards' distance from the ladder, about three quarters of the way up and set a little way back, there was a big stone missing from the inner wall, leaving a space just large enough to crouch in.

Although the recess did not form much of a hiding-place, it was just possible that they might omit to inspect it. Besides, Don Luis had no choice. At all events, after putting out the light, he leaned toward the edge of the hole, reached it, and managed to scramble in by bending himself in two.

Weber, Mazeroux, and their men were coming along. Don Luis propped himself against the back of his hiding-hole to avoid as far as possible the glare of the lanterns, of which he was beginning to see the gleams. And an amazing thing happened: the stone against which he was pushing toppled over slowly, as though moving on a pivot, and he fell backward into a second cavity situated behind it.

He quickly drew his legs after him and the stone swung back as slowly as before, not, however, without sending down a quantity of small stones, crumbling from the wall and half covering his legs.

"Well, well!" he chuckled. "Can Providence be siding with virtue and righteousness?"

He heard Mazeroux's voice saying:

"Nobody! And here's the end of the passage. Unless he ran away as we came—look, through the trapdoor at the top of this ladder."

Weber replied:

"Considering the slope by which we've come, it's certain that the trapdoor is on a level with the second floor. Well, the other little cross ought to mark the boudoir on the second floor, next to Don Luis's bedroom. That's what I supposed, and why I posted three of our men there. If he's tried to get out on that side, he's caught."

"We've only got to knock," said Mazeroux. "Our men will find the trapdoor and let us out. If not, we will break it down."

More blows echoed down the passage. Fifteen or twenty minutes after, the trapdoor gave way, and other voices now mingled with Weber's and Mazeroux's.

During this time, Don Luis examined his domain and perceived how extremely small it was. The most that he could do was to sit in it. It was a gallery, or, rather, a sort of gut, a yard and a half long and ending in an orifice, narrower still, heaped up with bricks. The walls, besides, were formed of bricks, some of which were lacking; and the building-stones which these should have kept in place crumbled at the least touch. The ground was strewn with them.

"By Jove!" thought Lupin, "I must not wriggle about too much, or I shall risk being buried alive! A pleasant prospect!"

Not only this, but the fear of making a noise kept him motionless. As a matter of fact, he was close to two rooms occupied by the detectives, first the boudoir and then the study, for the boudoir, as he knew, was over that part of his study which included the telephone box.

The thought of this suggested another. On reflection, remembering that he used sometimes to wonder how Count Malonyi's ancestress had managed to keep alive behind the curtain on the days when she had to hide there, he realized that there must have been a communication between the secret passage and what was now the telephone box, a communication too narrow to admit a person's body, but serving as a ventilating shaft.

As a precaution, in case the secret passage was discovered, a stone concealed the upper aperture of this shaft. Count Malonyi must have closed up the lower end when he restored the wainscoting of the study.

So there he was, imprisoned in the thickness of the walls, with no very definite intention beyond that of escaping from the clutches of the police. More hours passed.

Gradually, tortured with hunger and thirst, he fell into a heavy sleep, disturbed by painful nightmares which he would have given much to be able to throw off. But he slept too deeply to recover consciousness until eight o'clock in the evening.

When he woke up, feeling very tired, he saw his position in an unexpectedly hideous light and, at the same time, so accurately that, yielding to a sudden change of opinion marked by no little fear, he resolved to leave his hiding-place and give himself up. Anything was better than the torture which he was enduring and the dangers to which longer waiting exposed him.

But, on turning round to reach the entrance to his hole, he perceived first that the stone did not swing over when merely pushed, and, next, after several attempts, that he could not manage to find the mechanism which no doubt worked the stone. He persisted. His exertions were all in vain. The stone did not budge. Only, at each exertion, a few bits of stone came crumbling from the upper part of the wall and still further narrowed the space in which he was able to move.

It cost him a considerable effort to master his excitement and to say, jokingly:

"That's capital! I shall be reduced now to calling for help. I, Arsene Lupin! Yes, to call in the help of those gentlemen of the police. Otherwise, the odds on my being buried alive will increase every minute. They're ten to one as it is!"

He clenched his fists.

"Hang it! I'll get out of this scrape by myself! Call for help? Not if I know it!"

He summoned up all his energies to think, but his jaded brain gave him none but confused and disconnected ideas. He was haunted by Florence's image and by Marie Fauville's as well.

"It's to-night that I'm to save them," he said to himself. "And I certainly will save them, as they are not guilty and as I know the real criminal. But how shall I set about it to succeed?"

He thought of the Prefect of Police, of the meeting that was to take place at Fauville's house on the Boulevard Suchet. The meeting had begun. The police were watching the house. And this reminded him of the sheet of paper found by Weber in the eighth volume of Shakespeare's plays, and of the sentence written on it, which the Prefect had read out:

"Bear in mind that the explosion is independent of the letters, and that it will take place at three o'clock in the morning."

"Yes," thought Don Luis, accepting M. Desmalions's reasoning, "yes, in ten days' time. As there have been only three letters, the fourth will appear to-night; and the explosion will not take place until the fifth letter appears—that is in ten days from now."

He repeated:

"In ten days—with the fifth letter—in ten days—"

And suddenly he gave a start of fright. A horrible vision had flashed across his mind, a vision only too real. The explosion was to occur that very night! And all at once, knowing that he knew the truth, all at once, in a revival of his usual clear-sightedness, he accepted the theory as certain.

No doubt only three letters had appeared out of the mysterious darkness, but four letters ought to have appeared, because one of them had appeared not on the date fixed, but ten days later; and this for a reason which Don Luis knew. Besides, it was not a question of all this. It was not a question of seeking the truth amid this confusion of dates and letters, amid this intricate tangle in which no one could lay claim to any certainty,

No; one thing alone stood out above the situation: the sentence, "Bear in mind that the explosion is independent of the letters." And, as the explosion was put down for the night of the twenty-fifth of May, it would occur that very night, at three o'clock in the morning!

"Help! Help!" he cried.

This time he did not hesitate. So far, he had had the courage to remain huddled in his prison and to wait for the miracle that might come to his assistance; but he preferred to face every danger and undergo every penalty rather than abandon the Prefect of Police, Weber, Mazeroux, and their companions to the death that threatened them.

"Help! Help!"

Fauville's house would be blown up in three or four hours. That he knew with the greatest certainty. Just as punctually as the mysterious letters had reached their destination in spite of all the obstacles in the way, so the explosion would occur at the hour named. The infernal artificer of the accursed work had wished it so. At three o'clock in the morning there would be nothing left of the Fauvilles' house.

"Help! Help!"

He recovered enough strength to raise desperate shouts and to make his voice carry beyond the stones and beyond the wainscoting.

Then, when there seemed to be no answer to his call, he stopped and listened for a long time. There was not a sound. The silence was absolute.

Thereupon a terrible anguish covered him with a cold sweat. Supposing the detectives had ceased to watch the upper floors and confined themselves to spending the night in the rooms on the ground floor?

He madly took a brick and struck it repeatedly against the stone that closed the entrance, hoping that the noise would spread through the house. But an avalanche of small stones, loosened by the blows, at once fell upon him, knocking him down again and fixing him where he lay.

"Help! Help!"

More silence—a great, ruthless silence.

"Help! Help!"

He felt that his shouts did not penetrate the walls that stifled him. Besides, his voice was growing fainter and fainter, producing a hoarse groan that died away in his strained throat.

He ceased his cries and again listened, with all his anxious attention, to the great silence that surrounded as with layers of lead the stone coffin in which he lay imprisoned. Still nothing, not a sound. No one would come, no one could come to his assistance.

He continued to be haunted by Florence's name and image. And he thought also of Marie Fauville, whom he had promised to save. But Marie would die of starvation. And, like her, like Gaston Sauverand and so many others, he in his turn was the victim of this monstrous horror.

An incident occurred to increase his dismay. All of a sudden his electric lantern, which he had left alight to dispel the terrors of the darkness, went out. It was eleven o'clock at night.

He was overcome with a fit of giddiness. He could hardly breathe in the close and vitiated air. His brain suffered, as it were, a physical and exceedingly painful ailment, from the repetition of images that seemed to encrust themselves there; and it was always Florence's beautiful features or Marie's livid face. And, in his distraught brain, while Marie lay dying, he heard the explosion at the Fauvilles' house and saw the Prefect of Police and Mazeroux lying hideously mutilated, dead.

A numbness crept over him. He fell into a sort of swoon, in which he continued to stammer confused syllables:

"Florence—Marie—Marie—"



CHAPTER THIRTEEN

THE EXPLOSION

The fourth mysterious letter! The fourth of those letters "posted by the devil and delivered by the devil," as one of the newspapers expressed it!

We all of us remember the really extraordinary agitation of the public as the night of the twenty-fifth of May drew near. And fresh news increased this interest to a yet higher degree.

People heard in quick succession of the arrest of Sauverand, the flight of his accomplice, Florence Levasseur, Don Luis Perenna's secretary, and the inexplicable disappearance of Perenna himself, whom they insisted, for the best of reasons, on identifying with Arsene Lupin.

The police, assured from this moment of victory and having nearly all the actors in the tragedy in their power, had gradually given way to indiscretion; and, thanks to the particulars revealed to this or that journalist, the public knew of Don Luis's change of attitude, suspected his passion for Florence Levasseur and the real cause of his right-about-face, and thrilled with excitement as they saw that astonishing figure enter upon a fresh struggle.

What was he going to do? If he wanted to save the woman he loved from prosecution and to release Marie and Sauverand from prison, he would have to intervene some time that night, to take part, somehow or other, in the event at hand, and to prove the innocence of the three accomplices, either by arresting the invisible bearer of the fourth letter or by suggesting some plausible explanation. In short, he would have to be there; and that was interesting indeed!

And then the news of Marie Fauville was not good. With unwavering obstinacy she persisted in her suicidal plans. She had to be artificially fed; and the doctors in the infirmary at Saint-Lazare did not conceal their anxiety. Would Don Luis Perenna arrive in time?

Lastly, there was that one other thing, the threat of an explosion which was to blow up Hippolyte Fauville's house ten days after the delivery of the fourth letter, a really impressive threat when it was remembered that the enemy had never announced anything that did not take place at the stated hour. And, although it was still ten days—at least, so people thought—from the date fixed for the catastrophe, the threat made the whole business look more and more sinister.

That evening, therefore, a great crowd made its way, through La Muette and Auteuil, to the Boulevard Suchet, a crowd coming not only from Paris, but also from the suburbs and the provinces. The spectacle was exciting, and people wanted to see.

They saw only from a distance, for the police had barred the approaches a hundred yards from either side of the house and were driving into the ditches of the fortifications all those who managed to climb the opposite slope.

The sky was stormy, with heavy clouds revealed at intervals by the light of a silver moon. There were lightning-flashes and peals of distant thunder. Men sang. Street-boys imitated the noises of animals. People formed themselves into groups on the benches and pavements and ate and drank while discussing the matter.

A part of the night was spent in this way and nothing happened to reward the patience of the crowd, who began to wonder, somewhat wearily, if they would not do better to go home, seeing that Sauverand was in prison and that there was every chance that the fourth letter would not appear in the same mysterious way as the others.

And yet they did not go: Don Luis Perenna was due to come!

From ten o'clock in the evening the Prefect of Police and his secretary general, the chief detective and Weber, his deputy, Sergeant Mazeroux, and two detectives were gathered in the large room in which Fauville had been murdered. Fifteen more detectives occupied the remaining rooms, while some twenty others watched the roofs, the outside of the house, and the garden.

Once again a thorough search had been made during the afternoon, with no better results than before. But it was decided that all the men should keep awake. If the letter was delivered anywhere in the big room, they wanted to know and they meant to know who brought it. The police do not recognize miracles.

At twelve o'clock M. Desmalions had coffee served to his subordinates. He himself took two cups and never ceased walking from one end to the other of the room, or climbing the staircase that led to the attic, or going through the passage and hall. Preferring that the watch should be maintained under the most favourable conditions, he left all the doors opened and all the electric lights on.

Mazeroux objected:

"It has to be dark for the letter to come. You will remember, Monsieur le Prefet, that the other experiment was tried before and the letter was not delivered."

"We will try it again," replied M. Desmalions, who, in spite of everything, was really afraid of Don Luis's interference, and increased his measures to make it impossible.

Meanwhile, as the night wore on, the minds of all those present became impatient. Prepared for the angry struggle as they were, they longed for the opportunity to show their strength. They made desperate use of their ears and eyes.

At one o'clock there was an alarm that showed the pitch which the nervous tension had reached. A shot was fired on the first floor, followed by shouts. On inquiry, it was found that two detectives, meeting in the course of a round, had not recognized each other, and one of them had discharged his revolver in the air to inform his comrades.

In the meantime the crowd outside had diminished, as M. Desmalions perceived on opening the garden gate. The orders had been relaxed and sightseers were allowed to come nearer, though they were still kept at a distance from the pavement.

Mazeroux said:

"It is a good thing that the explosion is due in ten days' time and not to-night, Monsieur le Prefet; otherwise, all those good people would be in danger as well as ourselves."

"There will be no explosion in ten days' time, any more than there will be a letter to-night," said M. Desmalions, shrugging his shoulders. And he added, "Besides, on that day, the orders will be strict."

It was now ten minutes past two.

At twenty-five minutes past, as the Prefect was lighting a cigar, the chief detective ventured to joke:

"That's something you will have to do without, next time, Monsieur le Prefet. It would be too risky."

"Next time," said M. Desmalions, "I shall not waste time in keeping watch. For I really begin to think that all this business with the letters is over."

"You can never tell," suggested Mazeroux.

A few minutes more passed. M. Desmalions had sat down. The others also were seated. No one spoke.

And suddenly they all sprang up, with one movement, and the same expression of surprise.

A bell had rung.

They at once heard where the sound came from.

"The telephone," M. Desmalions muttered.

He took down the receiver.

"Hullo! Who are you?"

A voice answered, but so distant and so faint that he could only catch an incoherent noise and exclaimed:

"Speak louder! What is it? Who are you?"

The voice spluttered out a few syllables that seemed to astound him.

"Hullo!" he said. "I don't understand. Please repeat what you said. Who is it speaking?"

"Don Luis Perenna," was the answer, more distinctly this time.

The Prefect made as though to hang up the receiver; and he growled:

"It's a hoax. Some rotter amusing himself at our expense."

Nevertheless, in spite of himself, he went on in a gruff voice:

"Look here, what is it? You say you're Don Luis Perenna?"

"Yes."

"What do you want?"

"What's the time?"

"What's the time!"

The Prefect made an angry gesture, not so much because of the ridiculous question as because he had really recognized Don Luis's voice beyond mistake.

"Well?" he said, controlling himself. "What's all this about? Where are you?"

"At my house, above the iron curtain, in the ceiling of my study."

"In the ceiling!" repeated the Prefect, not knowing what to think.

"Yes; and more or less done for, I confess."

"We'll send and help you out," said M. Desmalions, who was beginning to enjoy himself.

"Later on, Monsieur le Prefet. First answer me. Quickly! If not, I don't know that I shall have the strength. What's the time?"

"Oh, look here!"

"I beg of you—"

"It's twenty minutes to three."

"Twenty minutes to three!"

It was as though Don Luis found renewed strength in a sudden fit of fear. His weak voice recovered its emphasis, and, by turns imperious, despairing, and beseeching, full of a conviction which he did his utmost to impart to M. Desmalions, he said:

"Go away, Monsieur le Prefet! Go, all of you; leave the house. The house will be blown up at three o'clock. Yes, yes, I swear it will. Ten days after the fourth letter means now, because there has been a ten days' delay in the delivery of the letters. It means now, at three o'clock in the morning. Remember what was written on the sheet which Deputy Chief Weber handed you this morning: 'The explosion is independent of the letters. It will take place at three o'clock in the morning.' At three o'clock in the morning, to-day, Monsieur le Prefet!" The voice faltered and then continued:

"Go away, please. Let no one remain in the house. You must believe me. I know everything about the business. And nothing can prevent the threat from being executed. Go, go, go! This is horrible; I feel that you do not believe me—and I have no strength left. Go away, every one of you!"

He said a few more words which M. Desmalions could not make out. Then the voice ceased; and, though the Prefect still heard cries, it seemed to him that those cries were distant, as though the instrument were no longer within the reach of the mouth that uttered them.

He hung up the receiver.

"Gentlemen," he said, with a smile, "it is seventeen to three. In seventeen minutes we shall all be blown up together. At least, that is what our good friend Don Luis Perenna declares."

In spite of the jokes with which this threat was met, there was a general feeling of uneasiness. Weber asked:

"Was it really Don Luis, Monsieur le Prefet?"

"Don Luis in person. He has gone to earth in some hiding-hole in his house, above the study; and his fatigue and privations seem to have unsettled him a little. Mazeroux, go and ferret him out—unless this is just some fresh trick on his part. You have your warrant."

Sergeant Mazeroux went up to M. Desmalions. His face was pallid.

"Monsieur le Prefet, did he tell you that we were going to be blown up?"

"He did. He relies on the note which M. Weber found in a volume of Shakespeare. The explosion is to take place to-night."

"At three o'clock in the morning?"

"At three o'clock in the morning—that is to say, in less than a quarter of an hour."

"And do you propose to remain, Monsieur le Prefet?"

"What next, Sergeant? Do you imagine that we are going to obey that gentleman's fancies?"

Mazeroux staggered, hesitated, and then, despite all his natural deference, unable to contain himself, exclaimed:

"Monsieur le Prefet, it's not a fancy. I have worked with Don Luis. I know the man. If he tells you that something is going to happen, it's because he has his reasons."

"Absurd reasons."

"No, no, Monsieur le Prefet," Mazeroux pleaded, growing more and more excited. "I swear that you must listen to him. The house will be blown up—he said so—at three o'clock. We have a few minutes left. Let us go. I entreat you, Monsieur le Prefet."

"In other words, you want us to run away."

"But it's not running away, Monsieur le Prefet. It's a simple precaution. After all, we can't risk—You, yourself, Monsieur le Prefet—"

"That will do."

"But, Monsieur le Prefet, as Don Luis said—"

"That will do, I say!" repeated the Prefect harshly. "If you're afraid, you can take advantage of the order which I gave you and go off after Don Luis."

Mazeroux clicked his heels together and, old soldier that he was, saluted:

"I shall stay here, Monsieur le Prefet."

And he turned and went back to his place at a distance.

* * * * *

Silence followed. M. Desmalions began to walk up and down the room, with his hands behind his back. Then, addressing the chief detective and the secretary general:

"You are of my opinion, I hope?" he said.

"Why, yes, Monsieur le Prefet."

"Well, of course! To begin with, that supposition is based on nothing serious. And, besides, we are guarded, aren't we? Bombs don't come tumbling on one's head like that. It takes some one to throw them. Well, how are they to come? By what way?"

"Same way as the letters," the secretary general ventured to suggest.

"What's that? Then you admit—?"

The secretary general did not reply and M. Desmalions did not complete his sentence. He himself, like the others, experienced that same feeling of uneasiness which gradually, as the seconds sped past, was becoming almost intolerably painful.

Three o'clock in the morning! ... The words kept on recurring to his mind. Twice he looked at his watch. There was twelve minutes left. There was ten minutes. Was the house really going to be blown up, by the mere effect of an infernal and all-powerful will?

"It's senseless, absolutely senseless!" he cried, stamping his foot.

But, on looking at his companions, he was amazed to see how drawn their faces were; and he felt his courage sink in a strange way. He was certainly not afraid; and the others were no more afraid than he. But all of them, from the chiefs to the simple detectives, were under the influence of that Don Luis Perenna whom they had seen accomplishing such extraordinary feats, and who had shown such wonderful ability throughout this mysterious adventure.

Consciously or unconsciously, whether they wished it or no, they looked upon him as an exceptional being endowed with special faculties, a being of whom they could not think without conjuring up the image of the amazing Arsene Lupin, with his legend of daring, genius, and superhuman insight.

And Lupin was telling them to fly. Pursued and hunted as he was, he voluntarily gave himself up to warn them of their danger. And the danger was immediate. Seven minutes more, six minutes more—and the house would be blown up.

With great simplicity, Mazeroux went on his knees, made the sign of the cross, and said his prayers in a low voice. The action was so impressive that the secretary general and the chief detective made a movement as though to go toward the Prefect of Police.

M. Desmalions turned away his head and continued his walk up and down the room. But his anguish increased; and the words which he had heard over the telephone rang in his ears; and all Perenna's authority, his ardent entreaties, his frenzied conviction—all this upset him. He had seen Perenna at work. He felt it borne in upon him that he had no right, in the present circumstances, to neglect the man's warning.

"Let's go," he said.

The words were spoken in the calmest manner; and it really seemed as if those who heard them regarded them merely as the sensible conclusion of a very ordinary state of affairs. They went away without hurry or disorder, not as fugitives, but as men deliberately obeying the dictates of prudence.

They stood back at the door to let the Prefect go first.

"No," he said, "go on; I'll follow you."

He was the last out, leaving the electric light full on.

In the hall he asked the chief detective to blow his whistle. When all the plain-clothesmen had assembled, he sent them out of the house together with the porter, and shut the door behind him. Then, calling the detectives who were watching the boulevard, he said:

"Let everybody stand a good distance away; push the crowd as far back as you can; and be quick about it. We shall enter the house again in half an hour."

"And you, Monsieur le Prefet?" whispered Mazeroux, "You won't remain here, I hope?"

"No, that I shan't!" he said, laughing. "If I take our friend Perenna's advice at all, I may as well take it thoroughly!"

"There is only two minutes left."

"Our friend Perenna spoke of three o'clock, not of two minutes to three. So—"

He crossed the boulevard, accompanied by his secretary general, the chief detective, and Mazeroux, and clambered up the slope of the fortifications opposite the house.

"Perhaps we ought to stoop down," suggested Mazeroux.

"Let's stoop, by all means," said the Prefect, still in a good humour. "But, honestly, if there's no explosion, I shall send a bullet through my head. I could not go on living after making myself look so ridiculous."

"There will be an explosion, Monsieur le Prefet," declared Mazeroux.

"What confidence you must have in our friend Don Luis!"

"You have just the same confidence, Monsieur le Prefet."

They were silent, irritated by the wait, and struggling with the absurd anxiety that oppressed them. They counted the seconds singly, by the beating of their hearts. It was interminable.

Three o'clock sounded from somewhere.

"You see," grinned M. Desmalions, in an altered voice, "you see! There's nothing, thank goodness!"

And he growled:

"It's idiotic, perfectly idiotic! How could any one imagine such nonsense!"

Another clock struck, farther away. Then the hour also rang from the roof of a neighbouring building.

Before the third stroke had sounded they heard a kind of cracking, and, the next moment, came the terrible blast, complete, but so brief that they had only, so to speak, a vision of an immense sheaf of flames and smoke shooting forth enormous stones and pieces of wall, something like the grand finale of a fireworks display. And it was all over. The volcano had erupted.

"Look sharp!" shouted the Prefect of Police, darting forward. "Telephone for the engines, quick, in case of fire!"

He caught Mazeroux by the arm:

"Run to my motor; you'll see her a hundred yards down the boulevard. Tell the man to drive you to Don Luis, and, if you find him, release him and bring him here."

"Under arrest, Monsieur le Prefet?"

"Under arrest? You're mad!"

"But, if the deputy chief—"

"The deputy chief will keep his mouth shut. I'll see to that. Be off!"

Mazeroux fulfilled his mission, not with greater speed than if he had been sent to arrest Don Luis, for Mazeroux was a conscientious man, but with extraordinary pleasure. The fight which he had been obliged to wage against the man whom he still called "the chief" had often distressed him to the point of tears. This time he was coming to help him, perhaps to save his life.

That afternoon the deputy chief had ceased his search of the house, by M. Desmalions's orders, as Don Luis's escape seemed certain, and left only three men on duty. Mazeroux found them in a room on the ground floor, where they were sitting up in turns. In reply to his questions, they declared that they had not heard a sound.

He went upstairs alone, so as to have no witnesses to his interview with the governor, passed through the drawing-room and entered the study.

Here he was overcome with anxiety, for, after turning on the light, the first glance revealed nothing to his eyes.

"Chief!" he cried, repeatedly. "Where are you, Chief?"

No answer.

"And yet," thought Mazeroux, "as he telephoned, he can't be far away."

In fact, he saw from where he stood that the receiver was hanging from its cord; and, going on to the telephone box, he stumbled over bits of brick and plaster that strewed the carpet. He then switched on the light in the box as well and saw a hand and arm hanging from the ceiling above him. The ceiling was broken up all around that arm. But the shoulder had not been able to pass through; and Mazeroux could not see the captive's head.

He sprang on to a chair and reached the hand. He felt it and was reassured by the warmth of its touch.

"Is that you, Mazeroux?" asked a voice that seemed to the sergeant to come from very far away.

"Yes, it's I. You're not wounded, are you? Nothing serious?"

"No, only stunned—and a bit faint—from hunger.... Listen to me."

"I'm listening."

"Open the second drawer on the left in my writing-desk.... You'll find—"

"Yes, Chief?"

"An old stick of chocolate."

"But—"

"Do as I tell you, Alexandre; I'm famished."

Indeed, Don Luis recovered after a moment or two and said, in a gayer voice:

"That's better. I can wait now. Go to the kitchen and fetch me some bread and some water."

"I'll be back at once, Chief."

"Not this way. Come back by Florence Levasseur's room and the secret passage to the ladder which leads to the trapdoor at the top."

And he told him how to make the stone swing out and how to enter the hollow in which he had expected to meet with such a tragic end.

The thing was done in ten minutes. Mazeroux cleared the opening, caught hold of Don Luis by the legs and pulled him out of his hole.

"Oh, dear, oh dear!" he moaned, in a voice full of pity. "What a position, Chief! How did you manage it all? Yes, I see: you must have dug down, where you lay, and gone on digging—for more than a yard! And it took some pluck, I expect, on an empty stomach!"

When Don Luis was seated in his bedroom and had swallowed a few bits of bread and drunk what he wanted, he told his story:

"Yes, it took the devil's own pluck, old man. By Jingo! when a chap's ideas are whirling in his head and he can't use his brain, upon my word, all he asks is to die? And then there was no air, you see. I couldn't breathe. I went on digging, however, as you saw, went on digging while I was half asleep, in a sort of nightmare. Just look: my fingers are in a jelly. But there, I was thinking of that confounded business of the explosion and I wanted to warn you at all costs, and I dug away at my tunnel. What a job! And then, oof! I felt space at last!

"I got my hand through and next my arm. Where was I? Why, over the telephone, of course! I knew that at once by feeling the wall and finding the wires. Then it took me quite half an hour to get hold of the instrument. I couldn't reach it with my arm.

"I managed at last with a piece of string and a slip-knot to fish up the receiver and hold it near my mouth, or, say, at ten inches from my mouth. And then I shouted and roared to make my voice carry; and, all the time, I was in pain. And then, at last, my string broke.... And then—and then—I hadn't an ounce of strength left in my body. Besides, you fellows had been warned; and it was for you to get yourselves out of the mess."

He looked at Mazeroux and asked him, as though certain of the reply:

"The explosion took place, didn't it?"

"Yes, Chief."

"At three o'clock exactly?"

"Yes."

"And of course M. Desmalions had the house cleared?"

"Yes."

"At the last minute?"

"At the last minute."

Don Luis laughed and said:

"I knew he would wait about and not give way until the crucial moment. You must have had a bad time of it, my poor Mazeroux, for of course you agreed with me from the start."

He kept on eating while he talked; and each mouthful seemed to bring back a little of his usual animation.

"Funny thing, hunger!" he said. "Makes you feel so light-headed. I must practise getting used to it, however."

"At any rate, Chief, no one would believe that you have been fasting for nearly forty-eight hours."

"Ah, that comes of having a sound constitution, with something to fall back upon! I shall be a different man in half an hour. Just give me time to shave and have a bath."

When he had finished dressing, he sat down to the breakfast of eggs and cold meat which Mazeroux had prepared for him; and then, getting up, said:

"Now, let's be off."

"But there's no hurry, Chief. Why don't you lie down for a few hours? The Prefect can wait."

"You're mad! What about Marie Fauville?"

"Marie Fauville?"

"Why, of course! Do you think I'm going to leave her in prison, or Sauverand, either? There's not a second to lose, old chap."

Mazeroux thought to himself that the chief had not quite recovered his wits yet. What? Release Marie Fauville and Sauverand, one, two, three, just like that! No, no, it was going a bit too far.

However, he took down to the Prefect's car a new Perenna, merry, brisk, and as fresh as though he had just got out of bed.

"Very flattering to my pride," said Don Luis to Mazeroux, "most flattering, that hesitation of the Prefect's, after I had warned him over the telephone, followed by his submission at the decisive moment. What a hold I must have on all those jokers, to make them sit up at a sign from little me! 'Beware, gentlemen!' I telephone to them from the bottomless pit. 'Beware! At three o'clock, a bomb!' 'Nonsense!' say they. 'Not a bit of it!' say I. 'How do you know?' 'Because I do.' 'But what proof have you?' 'What proof? That I say so.' 'Oh, well, of course, if you say so!' And, at five minutes to three, out they march. Ah, if I wasn't built up of modesty—"

They came to the Boulevard Suchet, where the crowd was so dense that they had to alight from the car. Mazeroux passed through the cordon of police protecting the approaches to the house and took Don Luis to the slope across the road.

"Wait for me here, Chief. I'll tell the Prefect of Police."

On the other side of the boulevard, under the pale morning sky in which a few black clouds still lingered, Don Luis saw the havoc wrought by the explosion. It was apparently not so great as he had expected. Some of the ceilings had fallen in and their rubbish showed through the yawning cavities of the windows; but the house remained standing. Even Fauville's built-out annex had not suffered overmuch, and, strange to say, the electric light, which the Prefect had left burning on his departure, had not gone out. The garden and the road were covered with stacks of furniture, over which a number of soldiers and police kept watch.

"Come with me, Chief," said Mazeroux, as he fetched Don Luis and led him toward the engineer's workroom.

A part of the floor was demolished. The outer walls on the left, near the passage, were cracked; and two workmen were fixing up beams, brought from the nearest timber yard, to support the ceiling. But, on the whole, the explosion had not had the results which the man who prepared it must have anticipated.

M. Desmalions was there, together with all the men who had spent the night in the room and several important persons from the public prosecutor's office. Weber, the deputy chief detective, alone had gone, refusing to meet his enemy.

Don Luis's arrival caused great excitement. The Prefect at once came up to him and said:

"All our thanks, Monsieur. Your insight is above praise. You have saved our lives; and these gentlemen and I wish to tell you so most emphatically. In my case, it is the second time that I have to thank you."

"There is a very simple way of thanking me, Monsieur le Prefet," said Don Luis, "and that is to allow me to carry out my task to the end."

"Your task?"

"Yes, Monsieur le Prefet. My action of last night is only the beginning. The conclusion is the release of Marie Fauville and Gaston Sauverand."

M. Desmalions smiled.

"Oh!"

"Am I asking too much, Monsieur le Prefet?"

"One can always ask, but the request should be reasonable. And the innocence of those people does not depend on me."

"No; but it depends on you, Monsieur le Prefet, to let them know if I prove their innocence to you."

"Yes, I agree, if you prove it beyond dispute."

"Just so."

Don Luis's calm assurance impressed M. Desmalions in spite of everything and even more than on the former occasions; and he suggested:

"The results of the hasty inspection which we have made will perhaps help you. For instance, we are certain that the bomb was placed by the entrance to the passage and probably under the boards of the floor."

"Please do not trouble, Monsieur le Prefet. These are only secondary details. The great thing now is that you should know the whole truth, and that not only through words."

The Prefect had come closer. The magistrate and detectives were standing round Don Luis, watching his lips and movements with feverish impatience. Was it possible that that truth, as yet so remote and vague, in spite of all the importance which they attached to the arrests already effected, was known at last?

It was a solemn moment. Every one was on tenterhooks. The manner in which Don Luis had foretold the explosion lent the value of an accomplished fact to his predictions; and the men whom he had saved from the terrible catastrophe were almost ready to accept as certainties the most improbable statements which a man of his stamp might make.

"Monsieur le Prefet," he said, "you waited in vain last night for the fourth letter to make its appearance. We shall now be able, by an unexpected miracle of chance, to be present at the delivery of the letter. You will then know that it was the same hand that committed all the crimes—and you will know whose hand that was."

And, turning to Mazeroux:

"Sergeant, will you please make the room as dark as you can? The shutters are gone; but you might draw the curtains across the windows and close the doors. Monsieur le Prefet, is it by accident that the electric light is on?"

"Yes, by accident. We will have it turned out."

"One moment. Have any of you gentlemen a pocket lantern about you? Or, no, it doesn't matter. This will do."

There was a candle in a sconce. He took it and lit it.

Then he switched off the electric light.

There was a half darkness, amid which the flame of the candle flickered in the draught from the windows. Don Luis protected the flame with his hand and moved to the table.

"I do not think that we shall be kept waiting long," he said. "As I foresee it, there will be only a few seconds before the facts speak for themselves and better than I could do."

Those few seconds, during which no one broke the silence, were unforgettable. M. Desmalions has since declared, in an interview in which he ridicules himself very cleverly, that his brain, over-stimulated by the fatigues of the night and by the whole scene before him, imagined the most unlikely events, such as an invasion of the house by armed assailants, or the apparition of ghosts and spirits.

He had the curiosity, however, he said, to watch Don Luis. Sitting on the edge of the table, with his head thrown a little back and his eyes roaming over the ceiling, Don Luis was eating a piece of bread and nibbling at a cake of chocolate. He seemed very hungry, but quite at his ease.

The others maintained that tense attitude which we put on at moments of great physical effort. Their faces were distorted with a sort of grimace. They were haunted by the memory of the explosion as well as obsessed by what was going to happen. The flame of the candle cast shadows on the wall.

More seconds elapsed than Don Luis Perenna had said, thirty or forty seconds, perhaps, that seemed endless. Then Perenna lifted the candle a little and said:

"There you are."

They had all seen what they now saw almost as soon as he spoke. A letter was descending from the ceiling. It spun round slowly, like a leaf falling from a tree without being driven by the wind. It just touched Don Luis and alighted on the floor between two legs of the table.

Picking up the paper and handing it to M. Desmalions, Don Luis said:

"There you are, Monsieur le Prefet. This is the fourth letter, due last night."



CHAPTER FOURTEEN

THE "HATER"

M. Desmalions looked at him without understanding, and looked from him to the ceiling. Perenna said:

"Oh, there's no witchcraft about it; and, though no one has thrown that letter from above, though there is not the smallest hole in the ceiling, the explanation is quite simple!"

"Quite simple, is it?" said M. Desmalions.

"Yes, Monsieur le Prefet. It all looks like an extremely complicated conjuring trick, done almost for fun. Well, I say that it is quite simple—and, at the same time, terribly tragic. Sergeant Mazeroux, would you mind drawing back the curtains and giving us as much light as possible?"

While Mazeroux was executing his orders and M. Desmalions glancing at the fourth letter, the contents of which were unimportant and merely confirmed the previous ones, Don Luis took a pair of steps which the workmen had left in the corner, set it up in the middle of the room and climbed to the top, where, seated astride, he was able to reach the electric chandelier.

It consisted of a broad, circular band in brass, beneath which was a festoon of crystal pendants. Inside were three lamps placed at the corners of a brass triangle concealing the wires.

He uncovered the wires and cut them. Then be began to take the whole fitting to pieces. To hasten matters, he asked for a hammer and broke up the plaster all round the clamps that held the chandelier in position.

"Lend me a hand, please," he said to Mazeroux.

Mazeroux went up the steps; and between them they took hold of the chandelier and let it slide down the uprights. The detectives caught it and placed it on the table with some difficulty, for it was much heavier than it looked.

On inspection, it proved to be surmounted by a cubical metal box, measuring about eight inches square, which box, being fastened inside the ceiling between the iron clamps, had obliged Don Luis to knock away the plaster that concealed it.

"What the devil's this?" exclaimed M. Desmalions.

"Open it for yourself, Monsieur le Prefet: there's a lid to it," said Perenna.

M. Desmalions raised the lid. The box was filled with springs and wheels, a whole complicated and detailed mechanism resembling a piece of clockwork.

"By your leave, Monsieur le Prefet," said Don Luis.

He took out one piece of machinery and discovered another beneath it, joined to the first by the gearing of two wheels; and the second was more like one of those automatic apparatuses which turn out printed slips.

Right at the bottom of the box, just where the box touched the ceiling, was a semicircular groove, and at the edge of it was a letter ready for delivery.

"The last of the five letters," said Don Luis, "doubtless continuing the series of denunciations. You will notice, Monsieur le Prefet, that the chandelier originally had a fourth lamp in the centre. It was obviously removed when the chandelier was altered, so as to make room for the letters to pass."

He continued his detailed explanations:

"So the whole set of letters was placed here, at the bottom. A clever piece of machinery, controlled by clockwork, took them one by one at the appointed time, pushed them to the edge of the groove concealed between the lamps and the pendants, and projected them into space."

None of those standing around Don Luis spoke, and all of them seemed perhaps a little disappointed. The whole thing was certainly very clever; but they had expected something better than a trick of springs and wheels, however surprising.

"Have patience, gentlemen," said Don Luis. "I promised you something ghastly; and you shall have it."

"Well, I agree," said the Prefect of Police, "that this is where the letters started from. But a good many points remain obscure; and, apart from this, there is one fact in particular which it seems impossible to understand. How were the criminals able to adapt the chandelier in this way? And, in a house guarded by the police, in a room watched night and day, how were they able to carry out such a piece of work without being seen or heard?"

"The answer is quite easy, Monsieur le Prefet: the work was done before the house was guarded by the police."

"Before the murder was committed, therefore?"

"Before the murder was committed."

"And what is to prove to me that that is so?"

"You have said so yourself, Monsieur le Prefet: because it could not have been otherwise."

"But do explain yourself, Monsieur!" cried M. Desmalions, with a gesture of irritation. "If you have important things to tell us, why delay?"

"It is better, Monsieur le Prefet, that you should arrive at the truth in the same way as I did. When you know the secret of the letters, the truth is much nearer than you think; and you would have already named the criminal if the horror of his crime had not been so great as to divert all suspicion from him."

M. Desmalions looked at him attentively. He felt the importance of Perenna's every word and he was really anxious.

"Then, according to you," he said, "those letters accusing Madame Fauville and Gaston Sauverand were placed there with the sole object of ruining both of them?"

"Yes, Monsieur le Prefet."

"And, as they were placed there before the crime, the plot must have been schemed before the murder?"

"Yes, Monsieur le Prefet, before the murder. From the moment that we admit the innocence of Mme. Fauville and Gaston Sauverand, we are obliged to conclude that, as everything accuses them, this is due to a series of deliberate acts. Mme. Fauville was out on the night of the murder: a plot! She was unable to say how she spent her time while the murder was being committed: a plot! Her inexplicable drive in the direction of La Muette and her cousin Sauverand's walk in the neighbourhood of the house: plots! The marks left in the apple by those teeth, by Mme. Fauville's own teeth: a plot and the most infernal of all!

"I tell you, everything is plotted beforehand, everything is, so to speak, prepared, measured out, labelled, and numbered. Everything takes place at the appointed time. Nothing is left to chance. It is a work very nicely pieced together, worthy of the most skilful artisan, so solidly constructed that outside happenings have not been able to throw it out of gear; and that the scheme works exactly, precisely, imperturbably, like the clockwork in this box, which is a perfect symbol of the whole business and, at the same time, gives a most accurate explanation of it, because the letters denouncing the murderers were duly posted before the crime and delivered after the crime on the dates and at the hours foreseen."

M. Desmalions remained thinking for a time and then objected:

"Still, in the letters which he wrote, M. Fauville accuses his wife."

"He does."

"We must therefore admit either that he was right in accusing her or that the letters are forged?"

"They are not forged. All the experts have recognized M. Fauville's handwriting."

"Then?"

"Then—"

Don Luis did not finish his sentence; and M. Desmalions felt the breath of the truth fluttering still nearer round him.

The others, one and all as anxious as himself, were silent. He muttered:

"I do not understand—"

"Yes, Monsieur le Prefet, you do. You understand that, if the sending of those letters forms an integrate part of the plot hatched against Mme. Fauville and Gaston Sauverand, it is because their contents were prepared in such a way as to be the undoing of the victims."

"What! What! What are you saying?"

"I am saying what I said before. Once they are innocent, everything that tells against them is part of the plot."

Again there was a long silence. The Prefect of Police did not conceal his agitation. Speaking very slowly, with his eyes fixed on Don Luis's eyes, he said:

"Whoever the culprit may be, I know nothing more terrible than this work of hatred."

"It is an even more improbable work than you can imagine, Monsieur le Prefet," said Perenna, with growing animation, "and it is a hatred of which you, who do not know Sauverand's confession, cannot yet estimate the violence. I understood it completely as I listened to the man; and, since then, all my thoughts have been overpowered by the dominant idea of that hatred. Who could hate like that? To whose loathing had Marie Fauville and Sauverand been sacrificed? Who was the inconceivable person whose perverted genius had surrounded his two victims with chains so powerfully forged?

"And another idea came to my mind, an earlier idea which had already struck me several times and to which I have already referred in Sergeant Mazeroux's presence: I mean the really mathematical character of the appearance of the letters. I said to myself that such grave documents could not be introduced into the case at fixed dates unless some primary reason demanded that those dates should absolutely be fixed. What reason? If a human agency had been at work each time, there would surely have been some irregularity dependent on this especially after the police had become cognizant of the matter and were present at the delivery of the letters.

"Well," Perenna continued, "in spite of every obstacle, the letters continued to come, as though they could not help it. And thus the reason of their coming gradually dawned upon me: they came mechanically, by some invisible process set going once and for all and working with the blind certainty of a physical law. This was a case not of a conscious intelligence and will, but just of material necessity.... It was the clash of these two ideas—the idea of the hatred pursuing the innocent and the idea of that machinery serving the schemes of the 'hater'—it was their clash that gave birth to the little spark of light. When brought into contact, the two ideas combined in my mind and suggested the recollection that Hippolyte Fauville was an engineer by profession!"

The others listened to him with a sort of uneasy oppression. What was gradually being revealed of the tragedy, instead of relieving the anxiety, increased it until it became absolutely painful.

M. Desmalions objected:

"Granting that the letters arrived on the dates named, you will nevertheless have noted that the hour varied on each occasion.

"That is to say, it varied according as we watched in the dark or not, and that is just the detail which supplied me with the key to the riddle. If the letters—and this was an indispensable precaution, which we are now able to understand—were delivered only under cover of the darkness, it must be because a contrivance of some kind prevented them from appearing when the electric light was on, and because that contrivance was controlled by a switch inside the room. There is no other explanation possible.

"We have to do with an automatic distributor that delivers the incriminating letters which it contains by clockwork, releasing them only between this hour and that on such and such a night fixed in advance and only at times when the electric light is off. You have the apparatus before you. No doubt the experts will admire its ingenuity and confirm my assertions. But, given the fact that it was found in the ceiling of this room, given the fact that it contained letters written by M. Fauville, am I not entitled to say that it was constructed by M. Fauville, the electrical engineer?"

Once more the name of M. Fauville returned, like an obsession; and each time the name stood more clearly defined. It was first M. Fauville; then M. Fauville, the engineer; then M. Fauville, the electrical engineer. And thus the picture of the "hater," as Don Luis said, appeared in its accurate outlines, giving those men, used though they were to the strangest criminal monstrosities, a thrill of terror. The truth was now no longer prowling around them. They were already fighting with it, as you fight with an adversary whom you do not see but who clutches you by the throat and brings you to the ground.

And the Prefect of Police, summing up all his impressions, said, in a strained voice:

"So M. Fauville wrote those letters in order to ruin his wife and the man who was in love with her?"

"Yes."

"In that case—"

"What?"

"Knowing, at the same time, that he was threatened with death, he wished, if ever the threat was realized, that his death should be laid to the charge of his wife and her friend?"

"Yes."

"And, in order to avenge himself on their love for each other and to gratify his hatred of them both, he wanted the whole set of facts to point to them as guilty of the murder of which he would be the victim?"

"Yes."

"So that—so that M. Fauville, in one part of his accursed work, was—what shall I say?—the accomplice of his own murder. He dreaded death. He struggled against it. But he arranged that his hatred should gain by it. That's it, isn't it? That's how it is?"