Fasten on the face piece and you yourself attend to the signal line." He dropped overboard and commenced descending slowly, while the captain anxiously and watchfully plied out the signal line and hose.

He reached bottom which was full of rocks covered with a slimy growth of marine vegetation; the pressure on him was something enormous.

It was very dark and he groped for some time without discovering anything.

He signaled the boat to move with him as he pursued his explorations.

At last his heart was gladdened by the sight of a wreck overgrown with a heavy mass of weeds and sea plumes.