As quickly as possible Amos Fearless turned and shoved the arm outside.
Dave was about to close the door when his father motioned him to desist.
Then the old diver caught up one of the torpedoes which had been brought along, set its clock-like movements in motion, and hurled it forth among the approaching company of demons.
It fell in their midst, and, attracted by the shining metallic covering of the torpedo, all crowded around the object.
As they did this, the door of the diving bell was closed and the signal was sent up to hoist away immediately.
Hardly had the diving bell begun to move when a fearful shock made it quiver from top to bottom and cracked one of the glass sides.
The torpedo had exploded, dealing death and destruction among the demons of the deep, impossible to describe.
Fully a score of the monsters were utterly annihilated, while nearly every one of the others was badly wounded.
One that escaped came after the diving bell, trying vainly to destroy the bell and those inside.
But an unlucky movement caused the demon to come in contact with one of the crab-like claws of the bell, and seeing this, Dave worked the claw instantly, thus making the demon a prisoner.