"Turn it off, Andy," said Jill. "If I hear that voice crooning that lullaby any more I shall go to sleep!"
Andy switched off the gramophone and went to the doorway of the shack. He was not afraid of the men coming back again for he was sure they thought there was no one on this island, at any rate.
A thought came into Andy's bead. He went back to the girls.
"I think it would be a good thing if I crossed to the second island to-night, when it's dark," he said. "I might be able to get into touch with Tom somehow and hear what has happened, even if I can't rescue him."
"Oh, Andy—we shall be left all alone," said Mary in dismay.
"We don't mind that, if Andy can help Tom," said Jill. "We'll stay here in the hut, Andy, and try to sleep whilst you go. But do be careful, won't you?"
"I'll be careful," said Andy. "I don't want to be made a prisoner, too—but you needn't be afraid of that! No enemy can catch me!"
So that night, when he had only the starlight to guide him, for the moon was not up, Andy crossed the line of rocks to the second island. He went very cautiously, for he did not want a single sound to come to the ears of anyone on the cave-beach.
He waded through the shallow water to the sand at the nearer end of the beach. He stood there, listening—and not very far off, close against the cliff where the cave-entrance was, he heard a cough!
"Oho!" said Andy to himself. "Thanks for that cough, dear sentry! I now know exactly where you are. You are behind the big rock at the cave opening. Well. I shall not go near you!"