"But now how to find Crockett? I made up my mind he wouldn't be in Danby's own house. That would be a deal too risky, with servants about and so on. I saw that Danby was a builder, and had three shops to let—it was on a paper before his house. What more likely prison than an empty house? I knocked at Danby's door and asked for the keys of those shops. I couldn't have them. The servant told me Danby was out (a manifest lie, for I had just seen him), and that nobody could see the shops till Monday. But I got out of her the address of the shops, and that was all I wanted at the time.

"Now, why was nobody to see those shops till Monday? The interval was suspicious—just enough to enable Crockett to be sent away again and cast loose after the Saturday racing, supposing him to be kept in one of the empty buildings. I went off at once and looked at the shops, forming my conclusions as to which would be the most likely for Danby's purpose. Here I had another confirmation of my ideas. A poor, half-bankrupt baker in one of the shops had, by the bills, the custody of a set of keys; but he, too, told me I couldn't have them; Danby had taken them away—and on Thursday, the very day—with some trivial excuse, and hadn't brought them back. That was all I wanted or could expect in the way of guidance. The whole thing was plain. The rest you know all about."

"Well, you're certainly as smart as they give you credit for, I must say. But suppose Danby had taken down his 'To Let' notice, what would you have done, then?"

"We had our course, even then. We should have gone to Danby, astounded him by telling him all about his little games, terrorized him with threats of the law, and made him throw up his hand and send Crockett back. But, as it is, you see, he doesn't know at this moment—probably won't know till to-morrow afternoon—that the lad is safe and sound here. You will probably use the interval to make him pay for losing the game—by some of the ingenious financial devices you are no doubt familiar with."

"Ay, that I will. He'll give any price against Crockett now, so long as the bet don't come direct from me."

"But about Crockett, now," Hewitt went on. "Won't this confinement be likely to have damaged his speed for a day or two?"

"Ah, perhaps," the landlord replied; "but, bless ye, that won't matter. There's four more in his heat to-morrow. Two I know aren't tryers, and the other two I can hold in at a couple of quid apiece any day. The third round and final won't be till to-morrow week, and he'll be as fit as ever by then. It's as safe as ever it was. How much are you going to have on? I'll lump it on for you safe enough. This is a chance not to be missed; it's picking money up."

"Thank you; I don't think I'll have anything to do with it. This professional pedestrian business doesn't seem a pretty one at all. I don't call myself a moralist, but, if you'll excuse my saying so, the thing is scarcely the game I care to pick tap money at in any way."

"Oh, very well! if you think so, I won't persuade ye, though I don't think so much of your smartness as I did, after that. Still, we won't quarrel; you've done me a mighty good turn, that I must say, and I only feel I aren't level without doing something to pay the debt. Come, now, you've got your trade as I've got mine. Let me have the bill, and I'll pay it like a lord, and feel a deal more pleased than if you made a favor of it—not that I'm above a favor, of course. But I'd prefer paying, and that's a fact."

"My dear sir, you have paid," Hewitt said, with a smile. "You paid in advance. It was a bargain, wasn't it, that I should do your business if you would help me in mine? Very well; a bargain's a bargain, and we've both performed our parts. And you mustn't be offended at what I said just now."

"That I won't! But as to that Raggy Steggles, once those heats are over to-morrow, I'll—well——"

It was on the following Sunday week that Martin Hewitt, in his rooms in London, turned over his paper and read, under the head "Padfield Annual 135 Yards Handicap," this announcement: "Final heat: Crockett, first; Willis, second; Trewby, third; Owen, 0; Howell, 0. A runaway win by nearly three yards."



III.

THE CASE OF MR. FOGGATT.

Almost the only dogmatism that Martin Hewitt permitted himself in regard to his professional methods was one on the matter of accumulative probabilities. Often when I have remarked upon the apparently trivial nature of the clews by which he allowed himself to be guided—sometimes, to all seeming, in the very face of all likelihood—he has replied that two trivialities, pointing in the same direction, became at once, by their mere agreement, no trivialities at all, but enormously important considerations. "If I were in search of a man," he would say, "of whom I knew nothing but that he squinted, bore a birthmark on his right hand, and limped, and I observed a man who answered to the first peculiarity, so far the clue would be trivial, because thousands of men squint. Now, if that man presently moved and exhibited a birthmark on his right hand, the value of that squint and that mark would increase at once a hundred or a thousand fold. Apart they are little; together much. The weight of evidence is not doubled merely; it would be only doubled if half the men who squinted had right-hand birthmarks; whereas the proportion, if it could be ascertained, would be, perhaps, more like one in ten thousand. The two trivialities, pointing in the same direction, become very strong evidence. And, when the man is seen to walk with a limp, that limp (another triviality), re-enforcing the others, brings the matter to the rank of a practical certainty. The Bertillon system of identification—what is it but a summary of trivialities? Thousands of men are of the same height, thousands of the same length of foot, thousands of the same girth of head—thousands correspond in any separate measurement you may name. It is when the measurements are taken together that you have your man identified forever. Just consider how few, if any, of your friends correspond exactly in any two personal peculiarities." Hewitt's dogma received its illustration unexpectedly close at home.

The old house wherein my chambers and Hewitt's office were situated contained, besides my own, two or three more bachelors' dens, in addition to the offices on the ground and first and second floors. At the very top of all, at the back, a fat, middle-aged man, named Foggatt, occupied a set of four rooms. It was only after a long residence, by an accidental remark of the housekeeper's, that I learned the man's name, which was not painted on his door or displayed, with all the others, on the wall of the ground-floor porch.

Mr. Foggatt appeared to have few friends, but lived in something as nearly approaching luxury as an old bachelor living in chambers can live. An ascending case of champagne was a common phenomenon of the staircase, and I have more than once seen a picture, destined for the top floor, of a sort that went far to awaken green covetousness in the heart of a poor journalist.

The man himself was not altogether prepossessing. Fat as he was, he had a way of carrying his head forward on his extended neck and gazing widely about with a pair of the roundest and most prominent eyes I remember to have ever seen, except in a fish. On the whole, his appearance was rather vulgar, rather arrogant, and rather suspicious, without any very pronounced quality of any sort. But certainly he was not pretty. In the end, however, he was found shot dead in his sitting-room.

It was in this way: Hewitt and I had dined together at my club, and late in the evening had returned to my rooms to smoke and discuss whatever came uppermost. I had made a bargain that day with two speculative odd lots at a book sale, each of which contained a hidden prize. We sat talking and turning over these books while time went unperceived, when suddenly we were startled by a loud report. Clearly it was in the building. We listened for a moment, but heard nothing else, and then Hewitt expressed his opinion that the report was that of a gunshot. Gunshots in residential chambers are not common things, wherefore I got up and went to the landing, looking up the stairs and down.

At the top of the next flight I saw Mrs. Clayton, the housekeeper. She appeared to be frightened, and told me that the report came from Mr. Foggatt's room. She thought he might have had an accident with the pistol that usually lay on his mantel-piece. We went upstairs with her, and she knocked at Mr. Foggatt's door.

There was no reply. Through the ventilating fanlight over the door it could be seen that there were lights within, a sign, Mrs. Clayton maintained, that Mr. Foggatt was not out. We knocked again, much more loudly, and called, but still ineffectually. The door was locked, and an application of the housekeeper's key proved that the tenant's key had been left in the lock inside. Mrs. Clayton's conviction that "something had happened" became distressing, and in the end Hewitt pried open the door with a small poker.

Something had happened. In the sitting-room Mr. Foggatt sat with his head bowed over the table, quiet and still. The head was ill to look at, and by it lay a large revolver, of the full-sized army pattern. Mrs. Clayton ran back toward the landing with faint screams.

"Run, Brett!" said Hewitt; "a doctor and a policeman!"

I bounced down the stairs half a flight at a time. "First," I thought, "a doctor. He may not be dead." I could think of no doctor in the immediate neighborhood, but ran up the street away from the Strand, as being the more likely direction for the doctor, although less so for the policeman. It took me a good five minutes to find the medico, after being led astray by a red lamp at a private hotel, and another five to get back, with a policeman.

Foggatt was dead, without a doubt. Probably had shot himself, the doctor thought, from the powder-blackening and other circumstances. Certainly nobody could have left the room by the door, or he must have passed my landing, while the fact of the door being found locked from the inside made the thing impossible. There were two windows to the room, both of which were shut, one being fastened by the catch, while the catch of the other was broken—an old fracture. Below these windows was a sheer drop of fifty feet or more, without a foot or hand-hold near. The windows in the other rooms were shut and fastened. Certainly it seemed suicide—unless it were one of those accidents that will occur to people who fiddle ignorantly with firearms. Soon the rooms were in possession of the police, and we were turned out.

We looked in at the housekeeper's kitchen, where her daughter was reviving and calming Mrs. Clayton with gin and water.

"You mustn't upset yourself, Mrs. Clayton," Hewitt said, "or what will become of us all? The doctor thinks it was an accident."

He took a small bottle of sewing-machine oil from his pocket and handed it to the daughter, thanking her for the loan.

* * * * *

There was little evidence at the inquest. The shot had been heard, the body had been found—that was the practical sum of the matter. No friends or relatives of the dead man came forward. The doctor gave his opinion as to the probability of suicide or an accident, and the police evidence tended in the same direction. Nothing had been found to indicate that any other person had been near the dead man's rooms on the night of the fatality. On the other hand, his papers, bankbook, etc., proved him to be a man of considerable substance, with no apparent motive for suicide. The police had been unable to trace any relatives, or, indeed, any nearer connections than casual acquaintances, fellow-clubmen, and so on. The jury found that Mr. Foggatt had died by accident.

"Well, Brett," Hewitt asked me afterward, "what do you think of the verdict?"

I said that it seemed to be the most reasonable one possible, and to square with the common-sense view of the case.

"Yes," he replied, "perhaps it does. From the point of view of the jury, and on their information, their verdict was quite reasonable. Nevertheless, Mr. Foggatt did not shoot himself. He was shot by a rather tall, active young man, perhaps a sailor, but certainly a gymnast—a young man whom I think I could identify if I saw him."

"But how do you know this?"

"By the simplest possible inferences, which you may easily guess, if you will but think."

"But, then, why didn't you say this at the inquest?"

"My dear fellow, they don't want any inferences and conjectures at an inquest; they only want evidence. If I had traced the murderer, of course then I should have communicated with the police. As a matter of fact, it is quite possible that the police have observed and know as much as I do—or more. They don't give everything away at an inquest, you know. It wouldn't do."

"But, if you are right, how did the man get away?"

"Come, we are near home now. Let us take a look at the back of the house. He couldn't have left by Foggatt's landing door, as we know; and as he was there (I am certain of that), and as the chimney is out of the question—for there was a good fire in the grate—he must have gone out by the window. Only one window is possible—that with the broken catch—for all the others were fastened inside. Out of that window, then, he went."

"But how? The window is fifty feet up."

"Of course it is. But why will you persist in assuming that the only way of escape by a window is downward? See, now, look up there. The window is at the top floor, and it has a very broad sill. Over the window is nothing but the flat face of the gable-end; but to the right, and a foot or two above the level of the top of the window, an iron gutter ends. Observe, it is not of lead composition, but a strong iron gutter, supported, just at its end, by an iron bracket. If a tall man stood on the end of the window-sill, steadying himself by the left hand and leaning to the right, he could just touch the end of this gutter with his right hand. The full stretch, toe to finger, is seven feet three inches. I have measured it. An active gymnast, or a sailor, could catch the gutter with a slight spring, and by it draw himself upon the roof. You will say he would have to be very active, dexterous, and cool. So he would. And that very fact helps us, because it narrows the field of inquiry. We know the sort of man to look for. Because, being certain (as I am) that the man was in the room, I know that he left in the way I am telling you. He must have left in some way, and, all the other ways being impossible, this alone remains, difficult as the feat may seem. The fact of his shutting the window behind him further proves his coolness and address at so great a height from the ground."

All this was very plain, but the main point was still dark.

"You say you know that another man was in the room," I said; "how do you know that?"

"As I said, by an obvious inference. Come, now, you shall guess how I arrived at that inference. You often speak of your interest in my work, and the attention with which you follow it. This shall be a simple exercise for you. You saw everything in the room as plainly as I myself. Bring the scene back to your memory, and think over the various small objects littering about, and how they would affect the case. Quick observation is the first essential for my work. Did you see a newspaper, for instance?"

"Yes. There was an evening paper on the floor, but I didn't examine it."

"Anything else?"

"On the table there was a whisky decanter, taken from the tantalus-stand on the sideboard, and one glass. That, by the by," I added, "looked as though only one person were present."

"So it did, perhaps, although the inference wouldn't be very strong. Go on!"

"There was a fruit-stand on the sideboard, with a plate beside it containing a few nutshells, a piece of apple, a pair of nut-crackers, and, I think, some orange peel. There was, of course, all the ordinary furniture, but no chair pulled up to the table, except that used by Foggatt himself. That's all I noticed, I think. Stay—there was an ash-tray on the table, and a partly burned cigar near it—only one cigar, though."

"Excellent—excellent, indeed, as far as memory and simple observation go. You saw everything plainly, and you remember everything. Surely now you know how I found out that another man had just left?"

"No, I don't; unless there were different kinds of ash in the ash-tray."

"That is a fairly good suggestion, but there were not—there was only a single ash, corresponding in every way to that on the cigar. Don't you remember everything that I did as we went down-stairs?"

"You returned a bottle of oil to the housekeeper's daughter, I think."

"I did. Doesn't that give you a hint? Come, you surely have it now?"

"I haven't."

"Then I sha'n't tell you; you don't deserve it. Think, and don't mention the subject again till you have at least one guess to make. The thing stares you in the face; you see it, you remember it, and yet you won't see it. I won't encourage your slovenliness of thought, my boy, by telling you what you can know for yourself if you like. Good-by—I'm off now. There's a case in hand I can't neglect."

"Don't you propose to go further into this, then?"

Hewitt shrugged his shoulders. "I'm not a policeman," he said. "The case is in very good hands. Of course, if anybody comes to me to do it as a matter of business, I'll take it up. It's very interesting, but I can't neglect my regular work for it. Naturally, I shall keep my eyes open and my memory in order. Sometimes these things come into the hands by themselves, as it were; in that case, of course, I am a loyal citizen, and ready to help the law. Au revoir!"

* * * * *

I am a busy man myself, and thought little more of Hewitt's conundrum for some time; indeed, when I did think, I saw no way to the answer. A week after the inquest I took a holiday (I had written my nightly leaders regularly every day for the past five years), and saw no more of Hewitt for six weeks. After my return, with still a few days of leave to run, one evening we together turned into Luzatti's, off Coventry Street, for dinner.

"I have been here several times lately," Hewitt said; "they feed you very well. No, not that table"—he seized my arm as I turned to an unoccupied corner—"I fancy it's draughty." He led the way to a longer table where a dark, lithe, and (as well as could be seen) tall young man already sat, and took chairs opposite him.

We had scarcely seated ourselves before Hewitt broke into a torrent of conversation on the subject of bicycling. As our previous conversation had been of a literary sort, and as I had never known Hewitt at any other time to show the slightest interest in bicycling, this rather surprised me. I had, however, such a general outsider's grasp of the subject as is usual in a journalist-of-all-work, and managed to keep the talk going from my side. As we went on I could see the face of the young man opposite brighten with interest. He was a rather fine-looking fellow, with a dark, though very clear skin, but had a hard, angry look of eye, a prominence of cheek-bone, and a squareness of jaw that gave him a rather uninviting aspect. As Hewitt rattled on, however, our neighbor's expression became one of pleasant interest merely.

"Of course," Hewitt said, "we've a number of very capital men just now, but I believe a deal in the forgotten riders of five, ten, and fifteen years back. Osmond, I believe, was better than any man riding now, and I think it would puzzle some of them to beat Furnivall as he was, at his best. But poor old Cortis—really, I believe he was as good as anybody. Nobody ever beat Cortis—except—let me see—I think somebody beat Cortis once—who was it now? I can't remember."

"Liles," said the young man opposite, looking up quickly.

"Ah, yes—Liles it was; Charley Liles. Wasn't it a championship?"

"Mile championship, 1880; Cortis won the other three, though."

"Yes, so he did. I saw Cortis when he first broke the old 2.46 mile record." And straightway Hewitt plunged into a whirl of talk of bicycles, tricycles, records, racing cyclists, Hillier, and Synyer and Noel Whiting, Taylerson and Appleyard—talk wherein the young man opposite bore an animated share, while I was left in the cold.

Our new friend, it seems, had himself been a prominent racing bicyclist a few years back, and was presently, at Hewitt's request, exhibiting a neat gold medal that hung at his watch-guard. That was won, he explained, in the old tall bicycle days, the days of bad tracks, when every racing cyclist carried cinder scars on his face from numerous accidents. He pointed to a blue mark on his forehead, which, he told us, was a track scar, and described a bad fall that had cost him two teeth, and broken others. The gaps among his teeth were plain to see as he smiled.

Presently the waiter brought dessert, and the young man opposite took an apple. Nut-crackers and a fruit-knife lay on our side of the stand, and Hewitt turned the stand to offer him the knife.

"No, thanks," he said; "I only polish a good apple, never peel it. It's a mistake, except with thick-skinned foreign ones."

And he began to munch the apple as only a boy or a healthy athlete can. Presently he turned his head to order coffee. The waiter's back was turned, and he had to be called twice. To my unutterable amazement Hewitt reached swiftly across the table, snatched the half-eaten apple from the young man's plate and pocketed it, gazing immediately, with an abstracted air, at a painted Cupid on the ceiling.

Our neighbor turned again, looked doubtfully at his plate and the table-cloth about it, and then shot a keen glance in the direction of Hewitt. He said nothing, however, but took his coffee and his bill, deliberately drank the former, gazing quietly at Hewitt as he did it, paid the latter, and left.

Immediately Hewitt was on his feet and, taking an umbrella, which stood near, followed. Just as he reached the door he met our late neighbor, who had turned suddenly back.

"Your umbrella, I think?" Hewitt asked, offering it.

"Yes, thanks." But the man's eye had more than its former hardness, and his jaw muscles tightened as I looked. He turned and went. Hewitt came back to me. "Pay the bill," he said, "and go back to your rooms; I will come on later. I must follow this man—it's the Foggatt case." As he went out I heard a cab rattle away, and immediately after it another.

I paid the bill and went home. It was ten o'clock before Hewitt turned up, calling in at his office below on his way up to me.

"Mr. Sidney Mason," he said, "is the gentleman the police will be wanting to-morrow, I expect, for the Foggatt murder. He is as smart a man as I remember ever meeting, and has done me rather neatly twice this evening."

"You mean the man we sat opposite at Luzatti's, of course?"

"Yes, I got his name, of course, from the reverse of that gold medal he was good enough to show me. But I fear he has bilked me over the address. He suspected me, that was plain, and left his umbrella by way of experiment to see if I were watching him sharply enough to notice the circumstance, and to avail myself of it to follow him. I was hasty and fell into the trap. He cabbed it away from Luzatti's, and I cabbed it after him. He has led me a pretty dance up and down London to-night, and two cabbies have made quite a stroke of business out of us. In the end he entered a house of which, of course, I have taken the address, but I expect he doesn't live there. He is too smart a man to lead me to his den; but the police can certainly find something of him at the house he went in at—and, I expect, left by the back way. By the way, you never guessed that simple little puzzle as to how I found that this was a murder, did you? You see it now, of course?"

"Something to do with that apple you stole, I suppose?"

"Something to do with it? I should think so, you worthy innocent. Just ring your bell; we'll borrow Mrs. Clayton's sewing-machine oil again. On the night we broke into Foggatt's room you saw the nutshells and the bitten remains of an apple on the sideboard, and you remembered it; and yet you couldn't see that in that piece of apple possibly lay an important piece of evidence. Of course I never expected you to have arrived at any conclusion, as I had, because I had ten minutes in which to examine that apple, and to do what I did with it. But, at least, you should have seen the possibility of evidence in it.

"First, now, the apple was white. A bitten apple, as you must have observed, turns of a reddish brown color if left to stand long. Different kinds of apples brown with different rapidities, and the browning always begins at the core. This is one of the twenty thousand tiny things that few people take the trouble to notice, but which it is useful for a man in my position to know. A russet will brown quite quickly. The apple on the sideboard was, as near as I could tell, a Newtown pippin or other apple of that kind, which will brown at the core in from twenty minutes to half an hour, and in other parts in a quarter of an hour more. When we saw it, it was white, with barely a tinge of brown about the exposed core. Inference, somebody had been eating it fifteen or twenty minutes before, perhaps a little longer—an inference supported by the fact that it was only partly eaten.

"I examined that apple, and found it bore marks of very irregular teeth. While you were gone, I oiled it over, and, rushing down to my rooms, where I always have a little plaster of Paris handy for such work, took a mold of the part where the teeth had left the clearest marks. I then returned the apple to its place for the police to use if they thought fit. Looking at my mold, it was plain that the person who had bitten that apple had lost two teeth, one at top and one below, not exactly opposite, but nearly so. The other teeth, although they would appear to have been fairly sound, were irregular in size and line. Now, the dead man had, as I saw, a very excellent set of false teeth, regular and sharp, with none missing. Therefore it was plain that somebody else had been eating that apple. Do I make myself clear?"

"Quite! Go on!"

"There were other inferences to be made—slighter, but all pointing the same way. For instance, a man of Foggatt's age does not, as a rule, munch an unpeeled apple like a school-boy. Inference, a young man, and healthy. Why I came to the conclusion that he was tall, active, a gymnast, and perhaps a sailor, I have already told you, when we examined the outside of Foggatt's window. It was also pretty clear that robbery was not the motive, since nothing was disturbed, and that a friendly conversation had preceded the murder—witness the drinking and the eating of the apple. Whether or not the police noticed these things I can't say. If they had had their best men on, they certainly would, I think; but the case, to a rough observer, looked so clearly one of accident or suicide that possibly they didn't.

"As I said, after the inquest I was unable to devote any immediate time to the case, but I resolved to keep my eyes open. The man to look for was tall, young, strong and active, with a very irregular set of teeth, a tooth missing from the lower jaw just to the left of the center, and another from the upper jaw a little farther still toward the left. He might possibly be a person I had seen about the premises (I have a good memory for faces), or, of course, he possibly might not.

"Just before you returned from your holiday I noticed a young man at Luzatti's whom I remembered to have seen somewhere about the offices in this building. He was tall, young, and so on, but I had a client with me, and was unable to examine him more narrowly; indeed, as I was not exactly engaged on the case, and as there are several tall young men about, I took little trouble. But to-day, finding the same young man with a vacant seat opposite him, I took the opportunity of making a closer acquaintance."

"You certainly managed to draw him out."

"Oh, yes; the easiest person in the world to draw out is a cyclist. The easiest cyclist to draw out is, of course, the novice, but the next easiest is the veteran. When you see a healthy, well-trained-looking man, who, nevertheless, has a slight stoop in the shoulders, and, maybe, a medal on his watch-guard, it is always a safe card to try him first with a little cycle-racing talk. I soon brought Mr. Mason out of his shell, read his name on his medal, and had a chance of observing his teeth—indeed, he spoke of them himself. Now, as I observed just now, there are several tall, athletic young men about, and also there are several men who have lost teeth. But now I saw that this tall and athletic young man had lost exactly two teeth—one from the lower jaw, just to the left of the center, and another from the upper jaw, farther still toward the left! Trivialities, pointing in the same direction, became important considerations. More, his teeth were irregular throughout, and, as nearly as I could remember it, looked remarkably like this little plaster mold of mine."

He produced from his pocket an irregular lump of plaster, about three inches long. On one side of this appeared in relief the likeness of two irregular rows of six or eight teeth, minus one in each row, where a deep gap was seen, in the position spoken of by my friend. He proceeded:

"This was enough at least to set me after this young man. But he gave me the greatest chance of all when he turned and left his apple (eaten unpeeled, remember!—another important triviality) on his plate. I'm afraid I wasn't at all polite, and I ran the risk of arousing his suspicions, but I couldn't resist the temptation to steal it. I did, as you saw, and here it is."

He brought the apple from his coat-pocket. One bitten side, placed against the upper half of the mold, fitted precisely, a projection of apple filling exactly the deep gap. The other side similarly fitted the lower half.

"There's no getting behind that, you see," Hewitt remarked. "Merely observing the man's teeth was a guide, to some extent, but this is as plain as his signature or his thumb impression. You'll never find two men bite exactly alike, no matter whether they leave distinct teeth-marks or not. Here, by the by, is Mrs. Clayton's oil. We'll take another mold from this apple, and compare them."

He oiled the apple, heaped a little plaster in a newspaper, took my water-jug, and rapidly pulled off a hard mold. The parts corresponding to the merely broken places in the apple were, of course, dissimilar; but as to the teeth-marks, the impressions were identical.

"That will do, I think," Hewitt said. "Tomorrow morning, Brett, I shall put up these things in a small parcel, and take them round to Bow Street."

"But are they sufficient evidence?"

"Quite sufficient for the police purpose. There is the man, and all the rest—his movements on the day and so forth—are simple matters of inquiry; at any rate, that is police business."

* * * * *

I had scarcely sat down to my breakfast on the following morning when Hewitt came into the room and put a long letter before me.

"From our friend of last night," he said; "read it."

This letter began abruptly, and undated, and was as follows:

"TO MARTIN HEWITT, ESQ.

"SIR: I must compliment you on the adroitness you exhibited this evening in extracting from me my name. The address I was able to balk you of for the time being, although by the time you read this you will probably have found it through the Law List, as I am an admitted solicitor. That, however, will be of little use to you, for I am removing myself, I think, beyond the reach even of your abilities of search. I knew you well by sight, and was, perhaps, foolish to allow myself to be drawn as I did. Still, I had no idea that it would be dangerous, especially after seeing you, as a witness with very little to say, at the inquest upon the scoundrel I shot. Your somewhat discourteous seizure of my apple at first amazed me—indeed, I was a little doubtful as to whether you had really taken it—but it was my first warning that you might be playing a deep game against me, incomprehensible as the action was to my mind. I subsequently reflected that I had been eating an apple, instead of taking the drink he first offered me, in the dead wretch's rooms on the night he came to his merited end. From this I assume that your design was in some way to compare what remained of the two apples—although I do not presume to fathom the depths of your detective system. Still, I have heard of many of your cases, and profoundly admire the keenness you exhibit. I am thought to be a keen man myself, but, although I was able, to some extent, to hold my own to-night, I admit that your acumen in this case alone is something beyond me.

"I do not know by whom you are commissioned to hunt me, nor to what extent you may be acquainted with my connection with the creature I killed. I have sufficient respect for you, however, to wish that you should not regard me as a vicious criminal, and a couple of hours to spare in which to offer you an explanation that will convince you that such is not altogether the case. A hasty and violent temper I admit possessing; but even now I can not forget the one crime it has led me into—for it is, I suppose, strictly speaking, a crime. For it was the man Foggatt who made a felon of my father before the eyes of the world, and killed him with shame. It was he who murdered my mother, and none the less murdered her because she died of a broken heart. That he was also a thief and a hypocrite might have concerned me little but for that.

"Of my father I remember very little. He must, I fear, have been a weak and incapable man in many respects. He had no business abilities—in fact, was quite unable to understand the complicated business matters in which he largely dealt. Foggatt was a consummate master of all those arts of financial jugglery that make so many fortunes, and ruin so many others, in matters of company promoting, stocks, and shares. He was unable to exercise them, however, because of a great financial disaster in which he had been mixed up a few years before, and which made his name one to be avoided in future. In these circumstances he made a sort of secret and informal partnership with my father, who, ostensibly alone in the business, acted throughout on the directions of Foggatt, understanding as little what he did, poor, simple man, as a schoolboy would have done. The transactions carried on went from small to large, and, unhappily from honorable to dishonorable. My father relied on the superior abilities of Foggatt with an absolute trust, carrying out each day the directions given him privately the previous evening, buying, selling, printing prospectuses, signing whatever had to be signed, all with sole responsibility and as sole partner, while Foggatt, behind the scenes absorbed the larger share of the profits. In brief, my unhappy and foolish father was a mere tool in the hands of the cunning scoundrel who pulled all the wires of the business, himself unseen and irresponsible. At last three companies, for the promotion of which my father was responsible, came to grief in a heap. Fraud was written large over all their history, and, while Foggatt retired with his plunder, my father was left to meet ruin, disgrace, and imprisonment. From beginning to end he, and he only, was responsible. There was no shred of evidence to connect Foggatt with the matter, and no means of escape from the net drawn about my father. He lived through three years of imprisonment, and then, entirely abandoned by the man who had made use of his simplicity, he died—of nothing but shame and a broken heart.

"Of this I knew nothing at the time. Again and again, as a small boy, I remember asking of my mother why I had no father at home, as other boys had—unconscious of the stab I thus inflicted on her gentle heart. Of her my earliest, as well as my latest, memory is that of a pale, weeping woman, who grudged to let me out of her sight.

"Little by little I learned the whole cause of my mother's grief, for she had no other confidant, and I fear my character developed early, for my first coherent remembrance of the matter is that of a childish design to take a table-knife and kill the bad man who had made my father die in prison and caused my mother to cry.

"One thing, however, I never knew—the name of that bad man. Again and again, as I grew older, I demanded to know, but my mother always withheld it from me, with a gentle reminder that vengeance was for a greater hand than mine.

"I was seventeen years of age when my mother died. I believe that nothing but her strong attachment to myself and her desire to see me safely started in life kept her alive so long. Then I found that through all those years of narrowed means she had contrived to scrape and save a little money—sufficient, as it afterward proved, to see me through the examinations for entrance to my profession, with the generous assistance of my father's old legal advisers, who gave me my articles, and who have all along treated me with extreme kindness.

"For most of the succeeding years my life does not concern the matter in hand. I was a lawyer's clerk in my benefactors' service, and afterward a qualified man among their assistants. All through the firm were careful, in pursuance of my poor mother's wishes, that I should not learn the name or whereabouts of the man who had wrecked her life and my father's. I first met the man himself at the Clifton Club, where I had gone with an acquaintance who was a member. It was not till afterward that I understood his curious awkwardness on that occasion. A week later I called (as I had frequently done) at the building in which your office is situated, on business with a solicitor who has an office on the floor above your own. On the stairs I almost ran against Mr. Foggatt. He started and turned pale, exhibiting signs of alarm that I could not understand, and asked me if I wished to see him.

"'No,' I replied, 'I didn't know you lived here. I am after somebody else just now. Aren't you well?'

"He looked at me rather doubtfully, and said he was not very well.

"I met him twice or thrice after that, and on each occasion his manner grew more friendly, in a servile, flattering, and mean sort of way—a thing unpleasant enough in anybody, but doubly so in the intercourse of a man with another young enough to be his own son. Still, of course, I treated the man civilly enough. On one occasion he asked me into his rooms to look at a rather fine picture he had lately bought, and observed casually, lifting a large revolver from the mantel-piece:

"'You see, I am prepared for any unwelcome visitors to my little den! He! He!' Conceiving him, of course, to refer to burglars, I could not help wondering at the forced and hollow character of his laugh. As we went down the stairs he said: 'I think we know one another pretty well now, Mr. Mason, eh? And if I could do anything to advance your professional prospects, I should be glad of the chance, of course. I understand the struggles of a young professional man—he! he!' It was the forced laugh again, and the man spoke nervously. 'I think,' he added, 'that if you will drop in to-morrow evening, perhaps I may have a little proposal to make. Will you?'

"I assented, wondering what this proposal could be. Perhaps this eccentric old gentleman was a good fellow, after all, anxious to do me a good turn, and his awkwardness was nothing but a natural delicacy in breaking the ice. I was not so flush of good friends as to be willing to lose one. He might be desirous of putting business in my way.

"I went, and was received with cordiality that even then seemed a little over-effusive. We sat and talked of one thing and another for a long while, and I began to wonder when Mr. Foggatt was coming to the point that most interested me. Several times he invited me to drink and smoke, but long usage to athletic training has given me a distaste for both practices, and I declined. At last he began to talk about myself. He was afraid that my professional prospects in this country were not great, but he had heard that in some of the colonies—South Africa, for example—young lawyers had brilliant opportunities.

"'If you'd like to go there,' he said, 'I've no doubt, with a little capital, a clever man like you could get a grand practice together very soon. Or you might buy a share in some good established practice. I should be glad to let you have L500, or even a little more, if that wouldn't satisfy you, and——'

"I stood aghast. Why should this man, almost a stranger, offer me L500, or even more, 'if that wouldn't satisfy' me? What claim had I on him? It was very generous of him, of course, but out of the question. I was, at least, a gentleman, and had a gentleman's self-respect. Meanwhile, he had gone maundering on, in a halting sort of way, and presently let slip a sentence that struck me like a blow between the eyes.

"'I shouldn't like you to bear ill-will because of what has happened in the past,' he said. 'Your late—your late lamented mother—I'm afraid—she had unworthy suspicions—I'm sure—it was best for all parties—your father always appreciated——'

"I set back my chair and stood erect before him. This groveling wretch, forcing the words through his dry lips, was the thief who had made another of my father and had brought to miserable ends the lives of both my parents! Everything was clear. The creature went in fear of me, never imagining that I did not know him, and sought to buy me off—to buy me from the remembrance of my dead mother's broken heart for L500—L500 that he had made my father steal for him! I said not a word. But the memory of all my mother's bitter years, and a savage sense of this crowning insult to myself, took a hold upon me, and I was a tiger. Even then I verily believe that one word of repentance, one tone of honest remorse, would have saved him. But he drooped his eyes, snuffled excuses, and stammered of 'unworthy suspicions' and 'no ill-will.' I let him stammer. Presently he looked up and saw my face; and fell back in his chair, sick with terror. I snatched the pistol from the mantel-piece, and, thrusting it in his face, shot him where he sat.

"My subsequent coolness and quietness surprise me now. I took my hat and stepped toward the door. But there were voices on the stairs. The door was locked on the inside, and I left it so. I went back and quietly opened a window. Below was a clear drop into darkness, and above was plain wall; but away to one side, where the slope of the gable sprang from the roof, an iron gutter ended, supported by a strong bracket. It was the only way. I got upon the sill and carefully shut the window behind me, for people were already knocking at the lobby door. From the end of the sill, holding on by the reveal of the window with one hand, leaning and stretching my utmost, I caught the gutter, swung myself clear, and scrambled on the roof. I climbed over many roofs before I found, in an adjoining street, a ladder lashed perpendicularly against the front of a house in course of repair. This, to me, was an easy opportunity of descent, notwithstanding the boards fastened over the face of the ladder, and I availed myself of it.

"I have taken some time and trouble in order that you (so far as I am aware the only human being beside myself who knows me to be the author of Foggatt's death) shall have at least the means of appraising my crime at its just value of culpability. How much you already know of what I have told you I can not guess. I am wrong, hardened, and flagitious, I make no doubt, but I speak of the facts as they are. You see the thing, of course, from your own point of view—I from mine. And I remember my mother!

"Trusting that you will forgive the odd freak of a man—a criminal, let us say—who makes a confidant of the man set to hunt him down, I beg leave to be, sir, your obedient servant,

"SIDNEY MASON."

I read the singular document through and handed it back to Hewitt.

"How does it strike you?" Hewitt asked.

"Mason would seem to be a man of very marked character," I said. "Certainly no fool. And, if his tale is true, Foggatt is no great loss to the world."

"Just so—if the tale is true. Personally I am disposed to believe it is."

"Where was the letter posted?"

"It wasn't posted. It was handed in with the others from the front-door letter-box this morning in an unstamped envelope. He must have dropped it in himself during the night. Paper," Hewitt proceeded, holding it up to the light, "Turkey mill, ruled foolscap. Envelope, blue, official shape, Pirie's watermark. Both quite ordinary and no special marks."

"Where do you suppose he's gone?"

"Impossible to guess. Some might think he meant suicide by the expression 'beyond the reach even of your abilities of search,' but I scarcely think he is the sort of man to do that. No, there is no telling. Something may be got by inquiring at his late address, of course; but, when such a man tells you he doesn't think you will find him, you may count upon its being a difficult job. His opinion is not to be despised."

"What shall you do?"

"Put the letter in the box with the casts for the police. Fiat justitia, you know, without any question of sentiment. As to the apple, I really think, if the police will let me, I'll make you a present of it. Keep it somewhere as a souvenir of your absolute deficiency in reflective observation in this case, and look at it whenever you feel yourself growing dangerously conceited. It should cure you."

* * * * *

This is the history of the withered and almost petrified half apple that stands in my cabinet among a number of flint implements and one or two rather fine old Roman vessels. Of Mr. Sidney Mason we never heard another word. The police did their best, but he had left not a track behind him. His rooms were left almost undisturbed, and he had gone without anything in the way of elaborate preparation for his journey, and without leaving a trace of his intentions.



IV.

THE CASE OF THE DIXON TORPEDO.

Hewitt was very apt, in conversation, to dwell upon the many curious chances and coincidences that he had observed, not only in connection with his own cases, but also in matters dealt with by the official police, with whom he was on terms of pretty regular, and, indeed, friendly, acquaintanceship. He has told me many an anecdote of singular happenings to Scotland Yard officials with whom he has exchanged experiences. Of Inspector Nettings, for instance, who spent many weary months in a search for a man wanted by the American Government, and in the end found, by the merest accident (a misdirected call), that the man had been lodging next door to himself the whole of the time; just as ignorant, of course, as was the inspector himself as to the enemy at the other side of the party-wall. Also of another inspector, whose name I can not recall, who, having been given rather meager and insufficient details of a man whom he anticipated having great difficulty in finding, went straight down the stairs of the office where he had received instructions, and actually fell over the man near the door, where he had stooped down to tie his shoe-lace! There were cases, too, in which, when a great and notorious crime had been committed, and various persons had been arrested on suspicion, some were found among them who had long been badly wanted for some other crime altogether. Many criminals had met their deserts by venturing out of their own particular line of crime into another; often a man who got into trouble over something comparatively small found himself in for a startlingly larger trouble, the result of some previous misdeed that otherwise would have gone unpunished. The ruble note-forger Mirsky might never have been handed over to the Russian authorities had he confined his genius to forgery alone. It was generally supposed at the time of his extradition that he had communicated with the Russian Embassy, with a view to giving himself up—a foolish proceeding on his part, it would seem, since his whereabouts, indeed even his identity as the forger, had not been suspected. He had communicated with the Russian Embassy, it is true, but for quite a different purpose, as Martin Hewitt well understood at the time. What that purpose was is now for the first time published.

* * * * *

The time was half-past one in the afternoon, and Hewitt sat in his inner office examining and comparing the handwriting of two letters by the aid of a large lens. He put down the lens and glanced at the clock on the mantel-piece with a premonition of lunch; and as he did so his clerk quietly entered the room with one of those printed slips which were kept for the announcement of unknown visitors. It was filled up in a hasty and almost illegible hand, thus:

Name of visitor: F. Graham Dixon.

Address: Chancery Lane.

Business: Private and urgent.

"Show Mr. Dixon in," said Martin Hewitt.

Mr. Dixon was a gaunt, worn-looking man of fifty or so, well, although rather carelessly, dressed, and carrying in his strong, though drawn, face and dullish eyes the look that characterizes the life-long strenuous brain-worker. He leaned forward anxiously in the chair which Hewitt offered him, and told his story with a great deal of very natural agitation.

"You may possibly have heard, Mr. Hewitt—I know there are rumors—of the new locomotive torpedo which the government is about adopting; it is, in fact, the Dixon torpedo, my own invention, and in every respect—not merely in my own opinion, but in that of the government experts—by far the most efficient and certain yet produced. It will travel at least four hundred yards farther than any torpedo now made, with perfect accuracy of aim (a very great desideratum, let me tell you), and will carry an unprecedentedly heavy charge. There are other advantages—speed, simple discharge, and so forth—that I needn't bother you about. The machine is the result of many years of work and disappointment, and its design has only been arrived at by a careful balancing of principles and means, which are expressed on the only four existing sets of drawings. The whole thing, I need hardly tell you, is a profound secret, and you may judge of my present state of mind when I tell you that one set of drawings has been stolen."

"From your house?"

"From my office, in Chancery Lane, this morning. The four sets of drawings were distributed thus: Two were at the Admiralty Office, one being a finished set on thick paper, and the other a set of tracings therefrom; and the other two were at my own office, one being a penciled set, uncolored—a sort of finished draft, you understand—and the other a set of tracings similar to those at the Admiralty. It is this last set that has gone. The two sets were kept together in one drawer in my room. Both were there at ten this morning; of that I am sure, for I had to go to that very drawer for something else when I first arrived. But at twelve the tracings had vanished."

"You suspect somebody, probably?"

"I can not. It is a most extraordinary thing. Nobody has left the office (except myself, and then only to come to you) since ten this morning, and there has been no visitor. And yet the drawings are gone!"

"But have you searched the place?"

"Of course I have! It was twelve o'clock when I first discovered my loss, and I have been turning the place upside down ever since—I and my assistants. Every drawer has been emptied, every desk and table turned over, the very carpet and linoleum have been taken up, but there is not a sign of the drawings. My men even insisted on turning all their pockets inside out, although I never for a moment suspected either of them, and it would take a pretty big pocket to hold the drawings, doubled up as small as they might be."

"You say your men—there are two, I understand—had neither left the office?"

"Neither; and they are both staying in now. Worsfold suggested that it would be more satisfactory if they did not leave till something was done toward clearing the mystery up, and, although, as I have said, I don't suspect either in the least, I acquiesced."

"Just so. Now—I am assuming that you wish me to undertake the recovery of these drawings?"

The engineer nodded hastily.

"Very good; I will go round to your office. But first perhaps you can tell me something about your assistants—something it might be awkward to tell me in their presence, you know. Mr. Worsfold, for instance?"

"He is my draughtsman—a very excellent and intelligent man, a very smart man, indeed, and, I feel sure, quite beyond suspicion. He has prepared many important drawings for me (he has been with me nearly ten years now), and I have always found him trustworthy. But, of course, the temptation in this case would be enormous. Still, I can not suspect Worsfold. Indeed, how can I suspect anybody in the circumstances?"

"The other, now?"

"His name's Ritter. He is merely a tracer, not a fully skilled draughtsman. He is quite a decent young fellow, and I have had him two years. I don't consider him particularly smart, or he would have learned a little more of his business by this time. But I don't see the least reason to suspect him. As I said before, I can't reasonably suspect anybody."

"Very well; we will get to Chancery Lane now, if you please, and you can tell me more as we go."

"I have a cab waiting. What else can I tell you?"

"I understand the position to be succinctly this: The drawings were in the office when you arrived. Nobody came out, and nobody went in; and yet they vanished. Is that so?"

"That is so. When I say that absolutely nobody came in, of course I except the postman. He brought a couple of letters during the morning. I mean that absolutely nobody came past the barrier in the outer office—the usual thing, you know, like a counter, with a frame of ground glass over it."

"I quite understand that. But I think you said that the drawings were in a drawer in your own room—not the outer office, where the draughtsmen are, I presume?"

"That is the case. It is an inner room, or, rather, a room parallel with the other, and communicating with it; just as your own room is, which we have just left."

"But, then, you say you never left your office, and yet the drawings vanished—apparently by some unseen agency—while you were there in the room?"

"Let me explain more clearly." The cab was bowling smoothly along the Strand, and the engineer took out a pocket-book and pencil. "I fear," he proceeded, "that I am a little confused in my explanation—I am naturally rather agitated. As you will see presently, my offices consist of three rooms, two at one side of a corridor, and the other opposite—thus." He made a rapid pencil sketch.



"In the outer office my men usually work. In the inner office I work myself. These rooms communicate, as you see, by a door. Our ordinary way in and out of the place is by the door of the outer office leading into the corridor, and we first pass through the usual lifting flap in the barrier. The door leading from the inner office to the corridor is always kept locked on the inside, and I don't suppose I unlock it once in three months. It has not been unlocked all the morning. The drawer in which the missing drawings were kept, and in which I saw them at ten o'clock this morning, is at the place marked D; it is a large chest of shallow drawers in which the plans lie flat."

"I quite understand. Then there is the private room opposite. What of that?"

"That is a sort of private sitting-room that I rarely use, except for business interviews of a very private nature. When I said I never left my office, I did not mean that I never stirred out of the inner office. I was about in one room and another, both the outer and the inner offices, and once I went into the private room for five minutes, but nobody came either in or out of any of the rooms at that time, for the door of the private room was wide open, and I was standing at the book-case (I had gone to consult a book), just inside the door, with a full view of the doors opposite. Indeed, Worsfold was at the door of the outer office most of the short time. He came to ask me a question."

"Well," Hewitt replied, "it all comes to the simple first statement. You know that nobody left the place or arrived, except the postman, who couldn't get near the drawings, and yet the drawings went. Is this your office?"

The cab had stopped before a large stone building. Mr. Dixon alighted and led the way to the first-floor. Hewitt took a casual glance round each of the three rooms. There was a sort of door in the frame of ground glass over the barrier to admit of speech with visitors. This door Hewitt pushed wide open, and left so.

He and the engineer went into the inner office. "Would you like to ask Worsfold and Ritter any questions?" Mr. Dixon inquired.

"Presently. Those are their coats, I take it, hanging just to the right of the outer office door, over the umbrella stand?"

"Yes, those are all their things—coats, hats, stick, and umbrella."

"And those coats were searched, you say?"

"Yes."

"And this is the drawer—thoroughly searched, of course?"

"Oh, certainly; every drawer was taken out and turned over."

"Well, of course I must assume you made no mistake in your hunt. Now tell me, did anybody know where these plans were, beyond yourself and your two men?"

"As far as I can tell, not a soul."

"You don't keep an office boy?"

"No. There would be nothing for him to do except to post a letter now and again, which Ritter does quite well for."

"As you are quite sure that the drawings were there at ten o'clock, perhaps the thing scarcely matters. But I may as well know if your men have keys of the office?"

"Neither. I have patent locks to each door and I keep all the keys myself. If Worsfold or Ritter arrive before me in the morning they have to wait to be let in; and I am always present myself when the rooms are cleaned. I have not neglected precautions, you see."

"No. I suppose the object of the theft—assuming it is a theft—is pretty plain: the thief would offer the drawings for sale to some foreign government?"

"Of course. They would probably command a great sum. I have been looking, as I need hardly tell you, to that invention to secure me a very large fortune, and I shall be ruined, indeed, if the design is taken abroad. I am under the strictest engagements to secrecy with the Admiralty, and not only should I lose all my labor, but I should lose all the confidence reposed in me at headquarters; should, in fact, be subject to penalties for breach of contract, and my career stopped forever. I can not tell you what a serious business this is for me. If you can not help me, the consequences will be terrible. Bad for the service of the country, too, of course."

"Of course. Now tell me this: It would, I take it, be necessary for the thief to exhibit these drawings to anybody anxious to buy the secret—I mean, he couldn't describe the invention by word of mouth."

"Oh, no, that would be impossible. The drawings are of the most complicated description, and full of figures upon which the whole thing depends. Indeed, one would have to be a skilled expert to properly appreciate the design at all. Various principles of hydrostatics, chemistry, electricity, and pneumatics are most delicately manipulated and adjusted, and the smallest error or omission in any part would upset the whole. No, the drawings are necessary to the thing, and they are gone."

At this moment the door of the outer office was heard to open and somebody entered. The door between the two offices was ajar, and Hewitt could see right through to the glass door left open over the barrier and into the space beyond. A well-dressed, dark, bushy-bearded man stood there carrying a hand-bag, which he placed on the ledge before him. Hewitt raised his hand to enjoin silence. The man spoke in a rather high-pitched voice and with a slight accent. "Is Mr. Dixon now within?" he asked.

"He is engaged," answered one of the draughtsmen; "very particularly engaged. I am afraid you won't be able to see him this afternoon. Can I give him any message?"

"This is two—the second time I have come to-day. Not two hours ago Mr. Dixon himself tells me to call again. I have a very important—very excellent steam-packing to show him that is very cheap and the best of the market." The man tapped his bag. "I have just taken orders from the largest railway companies. Can not I see him, for one second only? I will not detain him."

"Really, I'm sure you can't this afternoon; he isn't seeing anybody. But if you'll leave your name——"

"My name is Hunter; but what the good of that? He ask me to call a little later, and I come, and now he is engaged. It is a very great pity." And the man snatched up his bag and walking-stick, and stalked off, indignantly.

Hewitt stood still, gazing through the small aperture in the doorway.

"You'd scarcely expect a man with such a name as Hunter to talk with that accent, would you?" he observed, musingly. "It isn't a French accent, nor a German; but it seems foreign. You don't happen to know him, I suppose?"

"No, I don't. He called here about half-past twelve, just while we were in the middle of our search and I was frantic over the loss of the drawings. I was in the outer office myself, and told him to call later. I have lots of such agents here, anxious to sell all sorts of engineering appliances. But what will you do now? Shall you see my men?"

"I think," said Hewitt, rising—"I think I'll get you to question them yourself."

"Myself?"

"Yes, I have a reason. Will you trust me with the 'key' of the private room opposite? I will go over there for a little, while you talk to your men in this room. Bring them in here and shut the door; I can look after the office from across the corridor, you know. Ask them each to detail his exact movements about the office this morning, and get them to recall each visitor who has been here from the beginning of the week. I'll let you know the reason of this later. Come across to me in a few minutes."

Hewitt took the key and passed through the outer office into the corridor.

Ten minutes later Mr. Dixon, having questioned his draughtsmen, followed him. He found Hewitt standing before the table in the private room, on which lay several drawings on tracing-paper.

"See here, Mr. Dixon," said Hewitt, "I think these are the drawings you are anxious about?"

The engineer sprang toward them with a cry of delight. "Why, yes, yes," he exclaimed, turning them over, "every one of them! But where—how—they must have been in the place after all, then? What a fool I have been!"

Hewitt shook his head. "I'm afraid you're not quite so lucky as you think, Mr. Dixon," he said. "These drawings have most certainly been out of the house for a little while. Never mind how—we'll talk of that after. There is no time to lose. Tell me—how long would it take a good draughtsman to copy them?"

"They couldn't possibly be traced over properly in less than two or two and a half long days of very hard work," Dixon replied with eagerness.

"Ah! then it is as I feared. These tracings have been photographed, Mr. Dixon, and our task is one of every possible difficulty. If they had been copied in the ordinary way, one might hope to get hold of the copy. But photography upsets everything. Copies can be multiplied with such amazing facility that, once the thief gets a decent start, it is almost hopeless to checkmate him. The only chance is to get at the negatives before copies are taken. I must act at once; and I fear, between ourselves, it may be necessary for me to step very distinctly over the line of the law in the matter. You see, to get at those negatives may involve something very like house-breaking. There must be no delay, no waiting for legal procedure, or the mischief is done. Indeed, I very much question whether you have any legal remedy, strictly speaking."

"Mr. Hewitt, I implore you, do what you can. I need not say that all I have is at your disposal. I will guarantee to hold you harmless for anything that may happen. But do, I entreat you, do everything possible. Think of what the consequences may be!"

"Well, yes, so I do," Hewitt remarked, with a smile. "The consequences to me, if I were charged with house-breaking, might be something that no amount of guarantee could mitigate. However, I will do what I can, if only from patriotic motives. Now, I must see your tracer, Ritter. He is the traitor in the camp."

"Ritter? But how?"

"Never mind that now. You are upset and agitated, and had better not know more than is necessary for a little while, in case you say or do something unguarded. With Ritter I must take a deep course; what I don't know I must appear to know, and that will seem more likely to him if I disclaim acquaintance with what I do know. But first put these tracings safely away out of sight."

Dixon slipped them behind his book-case.

"Now," Hewitt pursued, "call Mr. Worsfold and give him something to do that will keep him in the inner office across the way, and tell him to send Ritter here."

Mr. Dixon called his chief draughtsman and requested him to put in order the drawings in the drawers of the inner room that had been disarranged by the search, and to send Ritter, as Hewitt had suggested.

Ritter walked into the private room with an air of respectful attention. He was a puffy-faced, unhealthy-looking young man, with very small eyes and a loose, mobile mouth.

"Sit down, Mr. Ritter," Hewitt said, in a stern voice. "Your recent transactions with your friend Mr. Hunter are well known both to Mr. Dixon and myself."

Ritter, who had at first leaned easily back in his chair, started forward at this, and paled.

"You are surprised, I observe; but you should be more careful in your movements out of doors if you do not wish your acquaintances to be known. Mr. Hunter, I believe, has the drawings which Mr. Dixon has lost, and, if so, I am certain that you have given them to him. That, you know, is theft, for which the law provides a severe penalty."

Ritter broke down completely and turned appealingly to Mr. Dixon.

"Oh, sir," he pleaded, "it isn't so bad, I assure you. I was tempted, I confess, and hid the drawings; but they are still in the office, and I can give them to you—really, I can."

"Indeed?" Hewitt went on. "Then, in that case, perhaps you'd better get them at once. Just go and fetch them in; we won't trouble to observe your hiding-place. I'll only keep this door open, to be sure you don't lose your way, you know—down the stairs, for instance."

The wretched Ritter, with hanging head, slunk into the office opposite. Presently he reappeared, looking, if possible, ghastlier than before. He looked irresolutely down the corridor, as if meditating a run for it, but Hewitt stepped toward him and motioned him back to the private room.

"You mustn't try any more of that sort of humbug," Hewitt said with increased severity. "The drawings are gone, and you have stolen them; you know that well enough. Now attend to me. If you received your deserts, Mr. Dixon would send for a policeman this moment, and have you hauled off to the jail that is your proper place. But, unfortunately, your accomplice, who calls himself Hunter—but who has other names besides that—as I happen to know—has the drawings, and it is absolutely necessary that these should be recovered. I am afraid that it will be necessary, therefore, to come to some arrangement with this scoundrel—to square him, in fact. Now, just take that pen and paper, and write to your confederate as I dictate. You know the alternative if you cause any difficulty."

Ritter reached tremblingly for the pen.

"Address him in your usual way," Hewitt proceeded. "Say this: 'There has been an alteration in the plans.' Have you got that? 'There has been an alteration in the plans. I shall be alone here at six o'clock. Please come, without fail.' Have you got it? Very well; sign it, and address the envelope. He must come here, and then we may arrange matters. In the meantime, you will remain in the inner office opposite."

The note was written, and Martin Hewitt, without glancing at the address, thrust it into his pocket. When Ritter was safely in the inner office, however, he drew it out and read the address. "I see," he observed, "he uses the same name, Hunter; 27 Little Carton Street, Westminster, is the address, and there I shall go at once with the note. If the man comes here, I think you had better lock him in with Ritter, and send for a policeman—it may at least frighten him. My object is, of course, to get the man away, and then, if possible, to invade his house, in some way or another, and steal or smash his negatives if they are there and to be found. Stay here, in any case, till I return. And don't forget to lock up those tracings."

* * * * *

It was about six o'clock when Hewitt returned, alone, but with a smiling face that told of good fortune at first sight.

"First, Mr. Dixon," he said, as he dropped into an easy chair in the private room, "let me ease your mind by the information that I have been most extraordinarily lucky; in fact, I think you have no further cause for anxiety. Here are the negatives. They were not all quite dry when I—well, what?—stole them, I suppose I must say; so that they have stuck together a bit, and probably the films are damaged. But you don't mind that, I suppose?"

He laid a small parcel, wrapped in a newspaper, on the table. The engineer hastily tore away the paper and took up five or six glass photographic negatives, of a half-plate size, which were damp, and stuck together by the gelatine films in couples. He held them, one after another, up to the light of the window, and glanced through them. Then, with a great sigh of relief, he placed them on the hearth and pounded them to dust and fragments with the poker.

For a few seconds neither spoke. Then Dixon, flinging himself into a chair, said:

"Mr. Hewitt, I can't express my obligation to you. What would have happened if you had failed, I prefer not to think of. But what shall we do with Ritter now? The other man hasn't been here yet, by the by."

"No; the fact is I didn't deliver the letter. The worthy gentleman saved me a world of trouble by taking himself out of the way." Hewitt laughed. "I'm afraid he has rather got himself into a mess by trying two kinds of theft at once, and you may not be sorry to hear that his attempt on your torpedo plans is likely to bring him a dose of penal servitude for something else. I'll tell you what has happened.

"Little Carton Street, Westminster, I found to be a seedy sort of place—one of those old streets that have seen much better days. A good many people seem to live in each house—they are fairly large houses, by the way—and there is quite a company of bell-handles on each doorpost, all down the side like organ-stops. A barber had possession of the ground floor front of No. 27 for trade purposes, so to him I went. 'Can you tell me,' I said, 'where in this house I can find Mr. Hunter?' He looked doubtful, so I went on: 'His friend will do, you know—I can't think of his name; foreign gentleman, dark, with a bushy beard.'

"The barber understood at once. 'Oh, that's Mirsky, I expect,' he said. 'Now, I come to think of it, he has had letters addressed to Hunter once or twice; I've took 'em in. Top floor back.'

"This was good so far. I had got at 'Mr. Hunter's' other alias. So, by way of possessing him with the idea that I knew all about him, I determined to ask for him as Mirsky before handing over the letter addressed to him as Hunter. A little bluff of that sort is invaluable at the right time. At the top floor back I stopped at the door and tried to open it at once, but it was locked. I could hear somebody scuttling about within, as though carrying things about, and I knocked again. In a little while the door opened about a foot, and there stood Mr. Hunter—or Mirsky, as you like—the man who, in the character of a traveler in steam-packing, came here twice to-day. He was in his shirt-sleeves, and cuddled something under his arm, hastily covered with a spotted pocket-handkerchief.

"'I have called to see M. Mirsky," I said, 'with a confidential letter——'

"'Oh, yas, yas,' he answered hastily; 'I know—I know. Excuse me one minute.' And he rushed off down-stairs with his parcel.

"Here was a noble chance. For a moment I thought of following him, in case there might be something interesting in the parcel. But I had to decide in a moment, and I decided on trying the room. I slipped inside the door, and, finding the key on the inside, locked it. It was a confused sort of room, with a little iron bedstead in one corner and a sort of rough boarded inclosure in another. This I rightly conjectured to be the photographic dark-room, and made for it at once.

"There was plenty of light within when the door was left open, and I made at once for the drying-rack that was fastened over the sink. There were a number of negatives in it, and I began hastily examining them one after another. In the middle of this our friend Mirsky returned and tried the door. He rattled violently at the handle and pushed. Then he called.

"At this moment I had come upon the first of the negatives you have just smashed. The fixing and washing had evidently only lately been completed, and the negative was drying on the rack. I seized it, of course, and the others which stood by it.

"'Who are you, there, inside?' Mirsky shouted indignantly from the landing. 'Why for you go in my room like that? Open this door at once, or I call the police!'

"I took no notice. I had got the full number of negatives, one for each drawing, but I was not by any means sure that he had not taken an extra set; so I went on hunting down the rack. There were no more, so I set to work to turn out all the undeveloped plates. It was quite possible, you see, that the other set, if it existed, had not yet been developed.

"Mirsky changed his tune. After a little more banging and shouting I could hear him kneel down and try the key-hole. I had left the key there, so that he could see nothing. But he began talking softly and rapidly through the hole in a foreign language. I did not know it in the least, but I believe it was Russian. What had led him to believe I understood Russian I could not at the time imagine, though I have a notion now. I went on ruining his stock of plates. I found several boxes, apparently of new plates, but, as there was no means of telling whether they were really unused or Avere merely undeveloped, but with the chemical impress of your drawings on them, I dragged every one ruthlessly from its hiding-place and laid it out in the full glare of the sunlight—destroying it thereby, of course, whether it was unused or not.

"Mirsky left off talking, and I heard him quietly sneaking off. Perhaps his conscience was not sufficiently clear to warrant an appeal to the police, but it seemed to me rather probable at the time that that was what he was going for. So I hurried on with my work. I found three dark slides—the parts that carried the plates in the back of the camera, you know—one of them fixed in the camera itself. These I opened, and exposed the plates to ruination as before. I suppose nobody ever did so much devastation in a photographic studio in ten minutes as I managed.

"I had spoiled every plate I could find, and had the developed negatives safely in my pocket, when I happened to glance at a porcelain washing-well under the sink. There was one negative in that, and I took it up. It was not a negative of a drawing of yours, but of a Russian twenty-ruble note!"

This was a discovery. The only possible reason any man could have for photographing a bank-note was the manufacture of an etched plate for the production of forged copies. I was almost as pleased as I had been at the discovery of your negatives. He might bring the police now as soon as he liked; I could turn the tables on him completely. I began to hunt about for anything else relating to this negative.

"I found an inking-roller, some old pieces of blanket (used in printing from plates), and in a corner on the floor, heaped over with newspapers and rubbish, a small copying-press. There was also a dish of acid, but not an etched plate or a printed note to be seen. I was looking at the press, with the negative in one hand and the inking-roller in the other, when I became conscious of a shadow across the window. I looked up quickly, and there was Mirsky hanging over from some ledge or projection to the side of the window, and staring straight at me, with a look of unmistakable terror and apprehension.

"The face vanished immediately. I had to move a table to get at the window, and by the time I had opened it there was no sign or sound of the rightful tenant of the room. I had no doubt now of his reason for carrying a parcel down-stairs. He probably mistook me for another visitor he was expecting, and, knowing he must take this visitor into his room, threw the papers and rubbish over the press, and put up his plates and papers in a bundle and secreted them somewhere down-stairs, lest his occupation should be observed.

"Plainly, my duty now was to communicate with the police. So, by the help of my friend the barber down-stairs, a messenger was found and a note sent over to Scotland Yard. I awaited, of course, for the arrival of the police, and occupied the interval in another look round—finding nothing important, however. When the official detective arrived, he recognized at once the importance of the case. A large number of forged Russian notes have been put into circulation on the Continent lately, it seems, and it was suspected that they came from London. The Russian Government have been sending urgent messages to the police here on the subject.

"Of course I said nothing about your business; but, while I was talking with the Scotland Yard man, a letter was left by a messenger, addressed to Mirsky. The letter will be examined, of course, by the proper authorities, but I was not a little interested to perceive that the envelope bore the Russian imperial arms above the words 'Russian Embassy.' Now, why should Mirsky communicate with the Russian Embassy? Certainly not to let the officials know that he was carrying on a very extensive and lucrative business in the manufacture of spurious Russian notes. I think it is rather more than possible that he wrote—probably before he actually got your drawings—to say that he could sell information of the highest importance, and that this letter was a reply. Further, I think it quite possible that, when I asked for him by his Russian name and spoke of 'a confidential letter,' he at once concluded that I had come from the embassy in answer to his letter. That would account for his addressing me in Russian through the key-hole; and, of course, an official from the Russian Embassy would be the very last person in the world whom he would like to observe any indications of his little etching experiments. But, anyhow, be that as it may," Hewitt concluded, "your drawings are safe now, and if once Mirsky is caught, and I think it likely, for a man in his shirt-sleeves, with scarcely any start, and, perhaps, no money about him, hasn't a great chance to get away—if he is caught, I say, he will probably get something handsome at St. Petersburg in the way of imprisonment, or Siberia, or what not; so that you will be amply avenged."

"Yes, but I don't at all understand this business of the drawings even now. How in the world were they taken out of the place, and how in the world did you find it out?"

"Nothing could be simpler; and yet the plan was rather ingenious. I'll tell you exactly how the thing revealed itself to me. From your original description of the case many people would consider that an impossibility had been performed. Nobody had gone out and nobody had come in, and yet the drawings had been taken away. But an impossibility is an impossibility, after all, and as drawings don't run away of themselves, plainly somebody had taken them, unaccountable as it might seem. Now, as they were in your inner office, the only people who could have got at them besides yourself were your assistants, so that it was pretty clear that one of them, at least, had something to do with the business. You told me that Worsfold was an excellent and intelligent draughtsman. Well, if such a man as that meditated treachery, he would probably be able to carry away the design in his head—at any rate, a little at a time—and would be under no necessity to run the risk of stealing a set of the drawings. But Ritter, you remarked, was an inferior sort of man. 'Not particularly smart,' I think, were your words—only a mechanical sort of tracer. He would be unlikely to be able to carry in his head the complicated details of such designs as yours, and, being in a subordinate position, and continually overlooked, he would find it impossible to make copies of the plans in the office. So that, to begin with, I thought I saw the most probable path to start on.

"When I looked round the rooms, I pushed open the glass door of the barrier and left the door to the inner office ajar, in order to be able to see any thing that might happen in any part of the place, without actually expecting any definite development. While we were talking, as it happened, our friend Mirsky (or Hunter—as you please) came into the outer office, and my attention was instantly called to him by the first thing he did. Did you notice anything peculiar yourself?"

"No, really, I can't say I did. He seemed to behave much as any traveler or agent might."

"Well, what I noticed was the fact that as soon as he entered the place he put his walking-stick into the umbrella-stand over there by the door, close by where he stood, a most unusual thing for a casual caller to do, before even knowing whether you were in. This made me watch him closely. I perceived with increased interest that the stick was exactly of the same kind and pattern as one already standing there, also a curious thing. I kept my eyes carefully on those sticks, and was all the more interested and edified to see, when he left, that he took the other stick—not the one he came with—from the stand, and carried it away, leaving his own behind. I might have followed him, but I decided that more could be learned by staying, as, in fact, proved to be the case. This, by the by, is the stick he carried away with him. I took the liberty of fetching it back from Westminster, because I conceive it to be Ritier's property."

Hewitt produced the stick. It was an ordinary, thick Malacca cane, with a buck-horn handle and a silver band. Hewitt bent it across his knee and laid it on the table.

"Yes," Dixon answered, "that is Ritter's stick. I think I have often seen it in the stand. But what in the world——"

"One moment; I'll just fetch the stick Mirsky left behind." And Hewitt stepped across the corridor.

He returned with another stick, apparently an exact fac-simile of the other, and placed it by the side of the other.

"When your assistants went into the inner room, I carried this stick off for a minute or two. I knew it was not Worsfold's, because there was an umbrella there with his initial on the handle. Look at this."

Martin Hewitt gave the handle a twist and rapidly unscrewed it from the top. Then it was seen that the stick was a mere tube of very thin metal, painted to appear like a Malacca cane.

"It was plain at once that this was no Malacca cane—it wouldn't bend. Inside it I found your tracings, rolled up tightly. You can get a marvelous quantity of thin tracing-paper into a small compass by tight rolling."

"And this—this was the way they were brought back!" the engineer exclaimed. "I see that clearly. But how did they get away? That's as mysterious as ever."

"Not a bit of it! See here. Mirsky gets hold of Ritter, and they agree to get your drawings and photograph them. Ritter is to let his confederate have the drawings, and Mirsky is to bring them back as soon as possible, so that they sha'n't be missed for a moment. Ritter habitually carries this Malacca cane, and the cunning of Mirsky at once suggests that this tube should be made in outward fac-simile. This morning Mirsky keeps the actual stick, and Ritter comes to the office with the tube. He seizes the first opportunity—probably when you were in this private room, and Worsfold was talking to you from the corridor—to get at the tracings, roll them up tightly, and put them in the tube, putting the tube back into the umbrella-stand. At half-past twelve, or whenever it was, Mirsky turns up for the first time with the actual stick and exchanges them, just as he afterward did when he brought the drawings back."

"Yes, but Mirsky came half an hour after they were—Oh, yes, I see. What a fool I was! I was forgetting. Of course, when I first missed the tracings, they were in this walking-stick, safe enough, and I was tearing my hair out within arm's reach of them!"

"Precisely. And Mirsky took them away before your very eyes. I expect Ritter was in a rare funk when he found that the drawings were missed. He calculated, no doubt, on your not wanting them for the hour or two they would be out of the office."

"How lucky that it struck me to jot a pencil-note on one of them! I might easily have made my note somewhere else, and then I should never have known that they had been away."

"Yes, they didn't give you any too much time to miss them. Well, I think the rest pretty clear. I brought the tracings in here, screwed up the sham stick and put it back. You identified the tracings and found none missing, and then my course was pretty clear, though it looked difficult. I knew you would be very naturally indignant with Ritter, so, as I wanted to manage him myself, I told you nothing of what he had actually done, for fear that, in your agitated state, you might burst out with something that would spoil my game. To Ritter I pretended to know nothing of the return of the drawings or how they had been stolen—the only things I did know with certainty. But I did pretend to know all about Mirsky—or Hunter—when, as a matter of fact, I knew nothing at all, except that he probably went under more than one name. That put Ritter into my hands completely. When he found the game was up, he began with a lying confession. Believing that the tracings were still in the stick and that we knew nothing of their return, he said that they had not been away, and that he would fetch them—as I had expected he would. I let him go for them alone, and, when he returned, utterly broken up by the discovery that they were not there, I had him altogether at my mercy. You see, if he had known that the drawings were all the time behind your book-case, he might have brazened it out, sworn that the drawings had been there all the time, and we could have done nothing with him. We couldn't have sufficiently frightened him by a threat of prosecution for theft, because there the things were in your possession, to his knowledge.