"Maybe it's Uncle Barney coming back with one of his friends," said Andy.
"No; neither of the men walks like the old lumberman," announced his twin.
"One of those men looks familiar to me," burst out Jack. He gazed intently at the advancing pair.
"There are two others behind them," broke in Fred. "Young fellows, I think."
"One of those men is Professor Lemm!" cried Jack.
"And the two fellows in the rear are Slugger Brown and Nappy Martell!" added Fred.