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 himself back in the cave of the dragon!
“Morbleu!” he muttered, “it is bewildering—this!”
Yet another door, this time one of ebony, he opened; and yet another matting-lined corridor presented itself to his gaze. He swept it with the ray of the little lamp, detected a door, opened it, and entered a similar suite to those with which he already was familiar. It was empty, but, unlike the one which he himself had tenanted, this suite possessed two doors, the second opening out of the bathroom. To this he ran; it was unlocked; he opened it, stepped ahead…and was back again in the cave of the dragon.
“Mon dieu!” he cried, “this is Chinese—quite Chinese!”
He stood looking about him, flashing the ray of light upon doors which were opened and upon openings in the walls where properly there should have been no doors.
“I am too late!” he muttered; “they had in-
