"Chadwick," replied Frank quietly. "Frank Chadwick."

"And you say you are castaways?" said the man. "What was your position aboard the ship?"

"Second officer," said Frank

"A merchant ship, you say?"

"Yes."

Frank did not deem it necessary to tell the other that he held a lieutenancy in the British royal navy.

"And you are the sole survivors?" demanded the man.

"So far as I know, yes."

"Good," said the leader of the party. "Then you shall come with us. It may be that you will have brains, in which event your fortune is assured. If no, well, it won't be hard to get rid of you. You'll come with me. Tell your men to follow."

Frank thought quickly. It was plain that he was in danger of some kind though as yet he was unable to tell just what.