It was a most astonishing move on the part of the boy. For a moment the monster of the island remained motionless, and then that horrible face disappeared.

With a leap, Frank plunged straight into the bushes, ready to grapple with the thing.

He found nothing! It had vanished!

Swaying bushes close at hand guided him, and he scarcely paused an instant. Straight forward he rushed, ready for the encounter at any instant.

He caught a glimpse of something plunging through the bushes, and he followed fearlessly.

A moment later he came out to open ground, and ahead of him he saw a misshapen figure running with wonderful speed toward the head of the cove.

Perhaps for the first time since the creature had been seen on the island the order of things had changed and it was the pursued instead of the pursuer.

"Stop!" shouted Frank.

The monster looked back over a twisted shoulder, and snarled like a wild animal, but ran faster than ever.