"Poor Professor! His troubles certainly are not over yet," laughed Tad.
"We must try not to annoy him so much this trip. We are older now and
ought to use better judgment."

"That's what I've been telling Ned," spoke up Stacy. "He's old enough
to-----"

"To---what?" demanded Ned.

Chunky quailed under the threatening gaze of Ned Rector. He mumbled
some unintelligible words, settled back in his chair and made himself
as inconspicuous as possible.

"Pooh! Professor Zepplin enjoys our pranks as much as do we ourselves.
He just makes believe that he doesn't. He's a boy himself."

"But an overgrown one," muttered Stacy under his breath.

"Where do we meet the Professor?" asked Tad.

"How about it, Walt?" asked Ned, turning to young Perkins.

"I don't think father mentioned that."

"We shall probably pick him up on the way out," nodded Tad.

"Well, what do you think of it?" demanded Ned.

"Fine, fine!"