"I rather think we will," replied Bart "But I don't know yet what it will be. Row fast now, Sandy."
In a little while the boat was near enough to the Riffles so that Bart could manage it alone for the rest of the distance. Sandy went ashore and disappeared in the woods that lined the bank while Bart tied the craft to an overhanging limb and got out.
He found his three chums were enjoying themselves in the water, splashing about and ducking one another. There were a number of High School boys with them, including several of the first-year class, from the ranks of which the secret society was made up.
"There's Bart!" cried Fenn. "Come on in!"
Anxious to tell his chums the news he had heard, but not wanting to awaken the suspicions of the Upside Down Club members, Bart prepared and went in swimming. He managed to get close to his three friends in turn, and quietly told them to go out, dress, and wait for him near the boat, which he told them was tied close at hand.
"Go out one at a time," Bart cautioned, "or they may suspect something."
In a little while the four boys were seated in their boat and were rowing down stream.
"Now what's up?" demanded Ned. "I declare you're as mysterious as though something had happened."
"Something's going to happen," said Bart.
"What?"