The Argo was scudding along in a good breeze to Barmouth. Ben was carving a small piece of wood into what he fancied was a resemblance to a mermaid. David, his hands clasped behind his head, lounged in a comfortable corner. Tuckerman was at the tiller, and Tom surveyed his pupil through approving eyes.

“Professor, I think we’re ready to give you your diploma,” Tom said, as he noticed the easy manner in which Tuckerman handled the sailboat. “You’re an able seaman. I’ll give you an honor mark as a navigator.”

“And I’ll pass you as a first-rate cook,” said David, turning and nodding his head. “You fried those eggs this morning just as well as I could have, and praise can’t be higher than that.”

“You coax the fish right out of the sea,” said Ben, looking up from his carving. “There was a time when I didn’t believe you’d ever learn to bait a hook so the fish couldn’t nibble it off; but you can do it now. I’ll graduate you as a competent fisherman.”

“And my swimming?” asked Tuckerman, his eye on the water curling over the bow.

“Well, as to that,” said David, “you’re not exactly a merman, but you can paddle along at a decent pace. Yes, we’ll call you a swimmer. I should say you were a pretty good all-around fellow now, Professor.”

Tuckerman looked pleased. Praise from these three boys was very satisfying. And he knew that what they said was not mere idle banter. He had learned a great deal since he had been camping with them.

“Thanks,” he said. “To be able to sail a boat, to cook, to fish, to swim—why, that’s more than I ever expected to learn when I came here from the west. I tell you what! It was a great thing for me when I decided to take a look at my Uncle Christopher’s island.”

“And what are you going to do with it now that you’ve seen it?” asked Tom.

“I don’t know. I’ve got to go back to my home. I don’t suppose anyone would want to live way out in the harbor nowadays. There’s not enough to do there. But I hate to take all those fine old furnishings out of the house. They belong there, and they don’t belong anywhere else.”