"I must try to attract the attention out there," decided the lad finally.
Choosing a piece of rock large enough to answer his purpose, he began thumping on the broken timbers. The attempt was not very successful, for he seemed to make no noise at all. Then something else occurred to him.
Seizing the Shovel, Steve Began Beating the Timbers.
"The shovel!" he cried. "Why did I not think of it before?"
Grabbing up the tool, he began beating the timbers with it in wide, swinging strokes.
Bang, bang, bang, went the shovel, the lad now and then pausing to listen. Once he thought he caught an answering blow from the opposite side, but he did not hear it again. Then he set up a piece of rock, the largest he could find, and began hammering on this.