had assumed to be a rather simple device, was, in truth, almost incomprehensible.
For how, in the name of Sanity, did the occupant of this room—and obviously it was occupied at times—enter and leave it?
'Ah!' he muttered, shining the light upon a row of yellow-bound volumes from which he had commenced his tour of inspection and to which that tour had now led him back, 'it is uncanny—this!'
He glanced back at the rectangular patch of light which marked the trap whereby he had entered this supernormal room. It was situated close to one corner of the library, and, acting upon an idea which came to him (any idea was better than none) he proceeded to throw down the books occupying the corresponding position at the other end of the shelf.
A second trap was revealed, identical with that through which he had entered!
It was fastened with a neat brass bolt; and, standing upon one of the little Persian tables—from which he removed a silver bowl of roses—he opened this trap and looked into the lighted room beyond. He saw an apartment almost identical with that which he himself recently had quitted; but in one particular it differed. It was occupied… AND BY A WOMAN!
Arrayed in a gossamer nightrobe she lay in the bed, beneath the trap, her sunken face matching the silken whiteness. Her thin arms drooped listlessly over the rails of the bunk, and upon her left hand M. Max perceived a wedding ring. Her hair, flaxen in the electric light, was spread about in wildest disorder upon the pillow, and a breath of fetid air assailed his nostrils as he pressed his face close to the gauze masking the opening in order to peer closely at this victim of the catacombs.
He watched the silken covering of her bosom, intently, but failed to detect the slightest movement.
'Morbleu!' he muttered, 'is she dead?'
He rent the gauze with a sweep of his left hand, and standing upon the bottom shelf of the case, craned forward into the room, looking all about him. A purple shaded lamp burnt above the bed as in the adjoining apartment which he himself had occupied. There were dainty feminine trifles littered in the big armchair, and a motor-coat hung upon the hook of the bathroom door. A small cabin-trunk in one corner of the room bore the initials: 'M. L.'
Max dropped back into the incredible library with a stifled gasp.
'Pardieu!' he said. 'It is Mrs. Leroux that I have found!'
A moment he stood looking from trap to trap; then turned and surveyed again the impassable walls, the rows of works, few of which were European, some of them bound in vellum, some in pigskin, and one row of huge volumes, ten in number, on the bottom shelf, in crocodile hide.
'It is weird, this!' he muttered, 'nightmare!'—turning the light from row to row. 'How is this lamp lighted that swings here?'
He began to search for the switch, and, even before he found it, had made up his mind that, once discovered, it would not only enable him more fully to illuminate the library, but would constitute a valuable clue.
At last he found it, situated at the back of one of the shelves, and set above a row of four small books, so that it could readily be reached by inserting the hand.
He flooded the place with light; and perceived at a glance that a length of white flex crossing the ceiling enabled anyone seated at the table to ignite the lamp from there also. Then, replacing his torch in his pocket, and assuring himself that the iron bar lay within easy reach, he began deliberately to remove all of the books from the shelves covering that side of the room upon which the switch was situated. His theory was a sound one; he argued that the natural and proper place for such a switch in such a room would be immediately inside the door, so that one entering could ignite the lamp without having to grope in the darkness. He was encouraged, furthermore, by the fact that at a point some four feet to the left of this switch there was a gap in the bookcases, running from floor to ceiling; a gap no more than four inches across.
Having removed every book from its position, save three, which occupied a shelf on a level with his shoulder and adjoining the gap, he desisted wearily, for many of the volumes were weighty, and the heat of the room was almost insufferable. He dropped with a sigh upon a silk ottoman close beside him… .
A short, staccato, muffled report split the heavy silence… and a little round hole appeared in the woodwork of the book-shelf before which, an instant earlier, M. Max had been standing—in the woodwork of that shelf, which had been upon a level with his head.
In one giant leap he hurled himself across the room—… as a second bullet pierced the yellow silk of the ottoman.
Close under the trap he crouched, staring up, fearful-eyed… .
A yellow hand and arm—a hand and arm of great nervous strength and of the hue of old ivory, directed a pistol through the opening above him. As he leaped, the hand was depressed with a lightning movement, but, lunging suddenly upward, Max seized the barrel of the pistol, and with a powerful wrench, twisted it from the grasp of the yellow hand. It was his own Browning!
At the time—in that moment of intense nervous excitement—he ascribed his sensations to his swift bout with Death—with Death who almost had conquered; but later, even now, as he wrenched the weapon into his grasp, he wondered if physical fear could wholly account for the sickening revulsion which held him back from that rectangular opening in the bookcase. He thought that he recognized in this a kindred horror—as distinct from terror—to that which had come to him with the odor of roses through this very trap, upon the night of his first visit to the catacombs of Ho-Pin.
It was not as the fear which one has of a dangerous wild beast, but as the loathing which is inspired by a thing diseased, leprous, contagious… .
A mighty effort of will was called for, but he managed to achieve it. He drew himself upright, breathing very rapidly, and looked through into the room—the room which he had occupied, and from which a moment ago the murderous yellow hand had protruded.
That room was empty… empty as he had left it!
'Mille tonnerres! he has escaped me!' he cried aloud, and the words did not seem of his own choosing.
WHO had escaped? Someone—man or woman; rather some THING, which, yellow handed, had sought to murder him!
Max ran across to the second trap and looked down at the woman whom he knew, beyond doubt, to be Mrs. Leroux. She lay in her death-like trance, unmoved.
Strung up to uttermost tension, he looked down at her and listened—listened, intently.
Above the fumes of the apartment in which the woman lay, a stifling odor of roses was clearly perceptible. The whole place was tropically hot. Not a sound, save the creaking of the shelf beneath him, broke the heavy stillness.
Chapter 39 THE LABYRINTH
Feverishly, Max clutched at the last three books upon the shelf adjoining the gap. Of these, the center volume, a work bound in yellow calf and bearing no title, proved to be irremovable; right and left it could be inclined, but not moved outward. It masked the lever handle of the door!
But that door was locked.
Max, with upraised arms, swept the perspiration from his brows and eyes; he leant dizzily up against the door which defied him; his mind was working with febrile rapidity. He placed the pistol in his pocket, and, recrossing the room, mounted up again upon the shelves, and crept through into the apartment beyond, from which the yellow hand had protruded. He dropped, panting, upon the bed, then, eagerly leaping to the door, grasped the handle.
'Pardieu!' he muttered, 'it is unlocked!'
Though the light was still burning in this room, the corridor outside was in darkness. He pressed the button of the ingenious lamp which was also a watch, and made for the door communicating with the cave of the dragon. It was readily to be detected by reason of its visible handle; the other doors being externally indistinguishable from the rest of the matting-covered wall.
The cave of the dragon proved to be empty, and in darkness. He ran across its polished floor and opened at random the door immediately facing him. A corridor similar to the one which he had just quitted was revealed. Another door was visible at one end, and to this he ran, pulled it open, stepped through the opening, and found
