search light and thus discover the nature of his surroundings became so strong that at length he disconnected the wires in order to remove the temptation.
He had hardly done this and resumed his position in the turret, when there came a shout, a shot, and a rush of feet. Then a cry in English of—
"Show a light, Professor; a light—quick!"
"Then two dripping figures scrambled aboard."
The startled man struck a match and held it aloft, where it was instantly extinguished by a little puff of wind. But its purpose was served, for even as it expired two dark forms leaped into the black water that closed above them. At the same moment half-a-dozen shots rang out spitefully, and one of them, evidently attracted by the Professor's light, glanced from the Mermaid's iron turret. Then two dripping figures scrambled aboard, the turret hatch was closed, and, with her crew safely reunited, the marvellous craft sank beneath the surface, without leaving a trace to be discovered by the flashing lanterns that, a