The painter at the boom had held her nose up until the weight was too much for it, and, with its parting, the little craft assumed nearly an even keel, while the water rushed forward among the battery jars beneath the deck. Then a strong, astringent odor arose through the seams in the deck, and Ross became alive.

"Battery gas!" he exclaimed, as he ran amidships, tumbling Foster off the torpedo with a kick—for he was in his way. He reached up and turned valve after valve, admitting compressed air from the flasks to the filled tanks, to blow out the water. This done, he looked at the depth indicator; it registered seventy feet; but, before he could determine the speed of descent, there came a shock that permeated the whole boat. They were on the bottom.

"And Lord only knows," groaned Ross, "how much we've taken in! But it's only three atmospheres, thank God. Here, you," he commanded to the nerveless Foster, who had again found a seat. "Lend a hand on this pump. I'll deal with your case when we get up."

"What must I do?" asked Foster, plaintively, as he turned his face, an ashy green now, toward Ross.

"Pump," yelled Ross, in his ear. "Pump till you break your back if necessary. Ship that brake."

He handed Foster his pump-brake, and they shipped them in the hand-pump. But, heave as they might, they could not move it, except in jerks of about an inch. With an old-fashioned force-pump, rusty from disuse, a three-inch outlet, and three atmospheres of pressure, pumping was useless, and they gave it up, even though the girl added her little weight and strength to the task.

Ross had plenty of compressed air in the numerous air flasks scattered about, and, as he could blow out no more tanks, he expended a jet into the choking atmosphere of the boat. It sweetened the air a little, but there was enough of the powerful, poisonous gas generated to keep them all coughing continually. However, he seated the girl close to the air jet, so that she need not suffer more than was necessary.

"Are we in danger, John?" she asked. "Real danger, I mean?"

"Yes, dear, we are," he answered, tenderly. "And it is best that you should know. I have driven out all the water possible, and we cannot pump at this depth. Higher up we could. But I can eject the torpedo from the tube, and perhaps the others. That will lighten us a good deal."

He went forward, driving Foster before him—for he did not care to leave him too close to the girl—and pushed him bodily into the cramped space between the tube and the trimming tanks.