For a moment, no one spoke; then I heard Hinman's voice, and it was decidedly unsteady.
"What is this, anyway?" he demanded. "The Arabian Nights?"
"No," said Godfrey, and in his voice was the ring of triumph. "It's merely a device of one of the cleverest fakirs who ever lived. Take the torch, Simmonds, and let us see how it works."
He dropped to his knees, while Simmonds lighted him, and I saw that there was a hole in the floor about three inches in diameter. Godfrey felt carefully about it for a moment, and then, with a little exclamation of triumph, found a hold for his fingers, pulled sharply, and raised a hinged section of the floor, about eighteen inches square.
"Now give us the light," he said, and plunged it into the opening.
In line with the little hole was an upright metal tube about a foot long, ending in a small square box. Beside the tube, a slender iron rod ran from the platform down into the box.
"That's the lever that sets it off," remarked Godfrey, tapping the rod. "A pressure of the foot did it."
He pulled the rod loose, seized the tube, and lifted the whole apparatus out upon the platform.
"Let's take it down where we can look at it," he said, and, carrying it easily in one hand, led the way back to the library, cleared a place on the table and set it down. Then, after a moment's examination, he pulled back a little bolt and tilted the top of the box, with the tube attached, to one side.
A curious mechanism lay revealed. There was a powerful spring, which could be wound up with a key, and a drum wound with filament-like wire and connected with a simple clock-work to revolve it. Two small dry-batteries were secured to one side of the box, their wires running to the drum.