“I am afraid some day when you are on the island he will set sail without you.”

Guy looked startled, as he well might, at this suggestion.

“He wouldn’t dare do that,” he replied.

“I don’t know. I believe he would dare to do anything. Besides——”

“Well, Frank,” said Guy, seeing that he hesitated.

“Besides, I don’t think the captain is wholly responsible for what he does.”

“Why do you think that?” asked Guy, quickly.

“From the way he behaves. Sometimes he paces up and down the deck, muttering to himself. I shouldn’t be surprised if he were off his base.”

“You mean that he is crazy?”

“It looks to me like that. I had an uncle who was affected in the same way. He used to go up and down through the village, muttering, and took very little notice of anyone he met when he had the fit on him. After a while he got worse, and at last had to be carried to an asylum.”