"My God!" whispered Robert Cairn—"that's Half-Moon Street—outside. There can be no light—"

He broke off, for now he perceived the Thing which had occasioned the girl's scream of horror.

In the middle of the rectangular patch of light, a grey shape, but partially opaque, moved—shifting, luminous clouds about it—was taking form, growing momentarily more substantial!

It had some remote semblance of a man; but its unique characteristic was its awful greyness. It had the greyness of a rain cloud, yet rather that of a column of smoke. And from the centre of the dimly defined head, two eyes—balls of living fire—glared out into the room!

Heat was beating into the library from the window—physical heat, as though a furnace door had been opened ... and the shape, ever growing more palpable, was moving forward towards them—approaching—the heat every instant growing greater.

It was impossible to look at those two eyes of fire; it was almost impossible to move. Indeed Robert Cairn was transfixed in such horror as, in all his dealings with the monstrous Ferrara, he had never known before. But his father, shaking off the dread which possessed him also, leapt at one bound to the library table.

Robert Cairn vaguely perceived that a small group of objects, looking like balls of wax, lay there. Dr. Cairn had evidently been preparing them in the locked study. Now he took them all up in his left hand, and confronted the Thing—which seemed to be growing into the room—for it did not advance in the ordinary sense of the word.

One by one he threw the white pellets into that vapoury greyness. As they touched the curtain, they hissed as if they had been thrown into a fire; they melted; and upon the transparency of the drapings, as upon a sheet of gauze, showed faint streaks, where, melting, they trickled down the tapestry.

As he cast each pellet from his hand, Dr. Cairn took a step forward, and cried out certain words in a loud voice—words which Robert Cairn knew he had never heard uttered before, words in a language which some instinct told him to be Ancient Egyptian.

Their effect was to force that dreadful shape gradually to disperse, as a cloud of smoke might disperse when the fire which occasions it is extinguished slowly. Seven pellets in all he threw towards the window—and the seventh struck the curtains, now once more visible in their proper form.

The Fire Elemental had been vanquished!

Robert Cairn clutched his hair in a sort of frenzy. He glared at the draped window, feeling that he was making a supreme effort to retain his sanity. Had it ever looked otherwise? Had the tapestry ever faded before him, becoming visible in a great light which had shone through it from behind? Had the Thing, a Thing unnameable, indescribable, stood there?

He read his answer upon the tapestry.

Whitening streaks showed where the pellets, melting, had trickled down the curtain!

"Lift Myra on the settee!"

It was Dr. Cairn speaking, calmly, but in a strained voice.

Robert Cairn, as if emerging from a mist, turned to the recumbent white form upon the carpet. Then, with a great cry, he leapt forward and raised the girl's head.

"Myra!" he groaned. "Myra, speak to me."

"Control yourself, boy," rapped Dr. Cairn, sternly; "she cannot speak until you have revived her! She has swooned—nothing worse."

"And—"

"We have conquered!"



CHAPTER XXXI

THE BOOK OF THOTH

The mists of early morning still floated over the fields, when these two, set upon strange business, walked through the damp grass to the door of the barn, where-from radiated the deathly waves which on the previous night had reached them, or almost reached them, in the library at Half-Moon Street.

The big double doors were padlocked, but for this they had come provided. Ten minutes work upon the padlock sufficed—and Dr. Cairn swung wide the doors.

A suffocating smell—the smell of that incense with which they had too often come in contact, was wafted out to them. There was a dim light inside the place, and without hesitation both entered.

A deal table and chair constituted the sole furniture of the interior. A part of the floor was roughly boarded, and a brief examination of the boarding sufficed to discover the hiding place in which Antony Ferrara kept the utensils of his awful art.

Dr. Cairn lifted out two heavy boards; and in a recess below lay a number of singular objects. There were four antique lamps of most peculiar design; there was a larger silver lamp, which both of them had seen before in various apartments occupied by Antony Ferrara. There were a number of other things which Robert Cairn could not have described, had he been called upon to do so, for the reason that he had seen nothing like them before, and had no idea of their nature or purpose.

But, conspicuous amongst this curious hoard, was a square iron box of workmanship dissimilar from any workmanship known to Robert Cairn. Its lid was covered with a sort of scroll work, and he was about to reach down, in order to lift it out, when:

"Do not touch it!" cried the doctor—"for God's sake, do not touch it!"

Robert Cairn started back, as though he had seen a snake. Turning to his father, he saw that the latter was pulling on a pair of white gloves. As he fixed his eyes upon these in astonishment, he perceived that they were smeared all over with some white preparation.

"Stand aside, boy," said the doctor—and for once his voice shook slightly. "Do not look again until I call to you. Turn your head aside!"

Silent with amazement, Robert Cairn obeyed. He heard his father lift out the iron box. He heard him open it, for he had already perceived that it was not locked. Then quite distinctly, he heard him close it again, and replace it in the cache.

"Do not turn, boy!" came a hoarse whisper.

He did not turn, but waited, his heart beating painfully, for what should happen next.

"Stand aside from the door," came the order, "and when I have gone out, do not look after me. I will call to you when it is finished."

He obeyed, without demur.

His father passed him, and he heard him walking through the damp grass outside the door of the barn. There followed an intolerable interval. From some place, not very distant, he could hear Dr. Cairn moving, hear the chink of glass upon glass, as though he were pouring out something from a stoppered bottle. Then a faint acrid smell was wafted to his nostrils, perceptible even above the heavy odour of the incense from the barn.

"Relock the door!" came the cry.

Robert Cairn reclosed the door, snapped the padlock fast, and began to fumble with the skeleton keys with which they had come provided. He discovered that to reclose the padlock was quite as difficult as to open it. His hands were trembling too; he was all anxiety to see what had taken place behind him. So that when at last a sharp click told of the task accomplished, he turned in a flash and saw his father placing tufts of grass upon a charred patch from which a faint haze of smoke still arose. He walked over and joined him.

"What have you done, sir?"

"I have robbed him of his armour," replied the doctor, grimly. His face was very pale, his eyes were very bright. "I have destroyed the Book of Thoth!"

"Then, he will be unable—"

"He will still be able to summon his dreadful servant, Rob. Having summoned him once, he can summon him again, but—"

"Well, sir?"

"He cannot control him."

"Good God!"

* * * * *

That night brought no repetition of the uncanny attack; and in the grey half light before the dawn, Dr. Cairn and his son, themselves like two phantoms, again crept across the field to the barn.

The padlock hung loose in the ring.

"Stay where you are, Rob!" cautioned the doctor.

He gently pushed the door open—wider—wider—and looked in. There was an overpowering odour of burning flesh. He turned to Robert, and spoke in a steady voice.

"The brood of the Witch-Queen is extinct!" he said.

* * * * *

BY THE SAME AUTHOR

THE MYSTERY OF DR. FU-MANCHU THE DEVIL DOCTOR THE SI-FAN MYSTERIES THE YELLOW CLAW EXPLOITS OF CAPT. O'HAGAN TALES OF SECRET EGYPT THE ROMANCE OF SORCERY

* * * * *

THE END