“Why, you just flop down on it against the crest of a surf wave, and the wave does the rest,” explained Bob. “At least, that’s the way it looked in the pictures. The wave carries you and the surfboard along in front of it, and believe me, you travel some, too.”

“Well, that listens all right,” said Jimmy dubiously. “But since you know all about it, it’s up to you to try it out, Bob.”

“Surest thing you know, I’ll try it out,” returned Bob. “I suppose we’ll get plenty of duckings while we’re learning how, but we’ll be out for a swim, anyway, so what’s the difference?”

On the morning following they sallied out bright and early, eager to experiment with this latest means of amusement.

“I only hope there’s a good surf running,” said Bob. “I suppose now that we want it to be a little rough, the sea will be as smooth as a mill pond.”

“Well, I hope not,” said Jimmy. “I’ve never seen a mill pond myself, but according to all the dope they must be about the stillest things that ever happened. I wonder if there is such a thing as a rough mill pond. If there is, I’d be willing to go a long way to see it.”

“Oh, there are lots of things like that,” said Herb, laughing. “For instance, whoever saw an aspen leaf that didn’t quiver?”

“Yes, or a terrier that didn’t shake a rat,” said Joe.

“Or a pirate that didn’t swagger,” said Jimmy.

“Or even a pancake that wasn’t flat,” added Bob.