A half mile above them the artist’s little cedar tender was bobbing its way across the inner channel, Billy Noon alone in it.

“He’s a mystery, that fellow,” observed Roy thoughtfully.

“Yes, but I’ll bet we’ll know more about him by to-morrow,” said Chub.

“Why to-morrow?”

“Because to-day’s Thursday.”

“Say, you know something, I’ll bet. Out with it, Chub.”

“No.” Chub shook his head. “No, I don’t know anything—for sure; I just suspect.”

“Well, what do you suspect?”

Chub thought a moment. Then, “I don’t know,” he answered with a grin.

“You’re an idiot,” said Roy good-naturedly. “Come on, let’s go back to the landing and get Harry. It must be nearly time.”