Glennie dropped the rope, flushed, and drew back. Matt had not asked him to go on the exploring expedition, and now Dick refused to have him render even trifling aid.

"I'm sorry you fellows have taken such a dead set at me," said Glennie.

"You told us where we stood when you first came off to us from the Port-of-Spain landing," returned Dick. "I don't see that you've got any kick coming because we took you at your word."

Glennie started to say something, but closed his mouth suddenly, and left the words unspoken. Perhaps he was beginning to see where he was at fault.

While he stood by the conning tower, watching Dick move aft with the rope in his hands, a sharp cry came suddenly from among the rocks.

"Dick! Clear the propeller, and sink the boat in——"

It was Matt's voice; although faint, it was unmistakable, and each word was strangely clear-cut and distinct.

Dick halted and faced about.

"Something's happening to Matt!" he cried.

The next moment he dropped the rope and started to spring ashore. But Glennie was already on the rocks.