Tom gave a gigantic yawn, and rolled over on to his bed.

But Ben lay awake for some time, until he got the sound of the lapping of waves on the beach mixed with John Tuckerman’s voice singing “Yo—heave—ho, my lads,” and then he fell asleep.

V—THE MAHOGANY MAN

Mr. Tuckerman was doing the crawl-stroke—slowly and laboriously, with almost as much splashing as a small paddle-wheel steamboat makes—but still very much better than he had been able to do it two days before. He was heading toward a rock, on which Tom, straight as an arrow and almost as brown as a chocolate drop, stood with his arms pointed outward, ready to dive.

Ben stood back of Tom, slapping his dripping thighs and hopping about on his toes. In the water David was floating, as comfortable and serene as a harbor seal taking an afternoon nap. “Look out, Professor,” he cautioned; “Tom might land on your head. He’s a terrible practical joker. Don’t you let him use you as a cushion.”

Tuckerman plowed along, gasping a little, his eyes fixed on the rock.

Tom dove, and came up alongside David. “If I was picking out a cushion, I’d take you. You’d make a bully springboard. Push right along, Mr. Tuckerman. You’re doing nobly.”

Ben gave a whoop. “Look out there!” Lithe as an eel, and seemingly made of rubber, he sprang from the rock, turned a somersault, and shot smoothly into the water. He reappeared, looking like a porpoise, his black hair all shiny, and with a few lusty flaps reached the rock again just as Tuckerman, breathless, put out his hands to clutch at the slippery side.

“You’re a regular flying-fish,” Ben complimented Tuckerman, as the latter, careful not to scrape too close against the rough edge of rock, drew himself slowly up to the level top. “I don’t believe any of your friends out in the plain country of Illinois would know you if they happened to see you now.”

“I don’t believe they would,” agreed Tuckerman, sitting down gingerly and embracing his knees with his hands. “I know I look like a red Indian, and I feel as if I’d got a thousand more muscles than I ever had before.”