“Yas, sah! Jes’ look ober yonder.”

Frank had reversed the motive key, and the Dolphin had come to a stop. Dead ahead, in the glare of the searchlight, was a monster body.

What Pomp had called a fish Frank instantly recognized.

It was a monster whale.

The cetacean, with the curiosity and pugnacity of its species, had boldly attacked this giant invader of its deep sea home.

Full tilt it had rushed upon the Dolphin. Only the buoyancy and strength of the submarine boat had saved it from being crushed like an eggshell.

Even now it seemed to be preparing for another dash at the Dolphin. Frank saw this.

He instantly started the engine and whirled the boat about so as to meet the whale head on.

The Dolphin had a ram, and if the whale should come in contact with this it would be a serious affair for him.

And the sea monster seemed inclined to accept the challenge.