“Is the rope fast to your wrist?”

“Yes.”

“Let me cut it.”

Gus held up his arm, and the next moment the cord was severed.

“Now strike out for the steamer,” said Oliver. “The shark is after you!”

And side by side they struck out.

But the shark was already close at hand. Try their best, they could not get away from him. Gus gave a piercing shriek.

“He is after my foot!”

“Dive!” called out Oliver; and he set the example.