"What?"

"Why, it's rising, chief, it's rising! . . ."

"What's rising?"

"The water! . . ."

M. Lenormand felt a shudder pass over his skin. He suddenly understood. It was not a casual trickling through, as he had thought, but a carefully-prepared flood, mechanically, irresistibly produced by some infernal system.

"Oh, the scoundrel!" he snarled. "If ever I lay hands on him . . . !"

"Yes, yes, chief, but we must first get out of this. . . . And, as far as I can see . . ."

Gourel seemed completely prostrated, incapable of having an idea, of proposing a plan.

M. Lenormand knelt down on the ground and measured the rate at which the water was rising. A quarter, or thereabouts, of the first door was covered; and the water was half-way toward the second door.

"The progress is slow, but uninterrupted," he said "In a few hours it will be over our heads."