“I wonder, too. By the way, how did you happen out there—and just at the right minute? I thought I saw you start a race for the beach with Betty and Phil?”

Terry nodded his wet head and laughed. “That was only a bluff to make you think I wasn’t coming after you. As I saw you were having an argument with him, and I didn’t like the way he was acting, I swam around the tail of his plane and got aboard on the farther deck—and—well, you know the rest. Why did you want to go aboard?”

“Curiosity, pure and simple. Have you any idea why he flies over the Club nearly every afternoon, and always at the same time?”

“No—have you?”

“Not the dimmest. But now that I know friend pilot wears false whiskers, I’m certainly intrigued.”

“Come again,” frowned Terry. “I didn’t get that last one. Did you say intrigued?”

“Cut the clowning. This is serious, Terry. That fellow is up to some mischief, or he wouldn’t disguise himself.”

Behind them the amphibian’s engine sputtered, then roared.

“I’ve got an idea,” said Terry as the two watched the plane taxi out toward the takeoff. “Why don’t you get your bus and follow that bird some afternoon?”

“I’d already decided to do it tomorrow. Want to come?”