"No, and I'm afraid we won't, either," declared the elder Racer boy. "It seems to be a mystery we'll never solve. If we could only find that missing motor boat it might help some. But I guess that's sunk, though it was floating when we took Paul aboard our craft."

The boys rowed slowly about the spot where the whale had gone down, casting eager glances from time to time at the rolling billows. They were careful to keep far enough away so that the rising monster would not come up beneath them, and capsize the boat.

It was a little short of an hour when Frank, who had stood up to stretch his cramped legs, suddenly uttered an exclamation:

"Look!" he cried, and pointed dead ahead.

Something rose from the sea, rolled over several times, and then swayed gently with the motion of the waves.

"Our whale!" cried Andy.

"Dead as a door nail!" added Frank.

"Don't be too sure," cautioned Bob. "Wait a minute."

They waited, but there was no motion to the monster save that caused by the heaving ocean, and they ventured closer.

"Gee whizz! He's big all right!" exclaimed Andy.