Both boys froze into alert attention. Faintly they had heard a whistle from down-creek.

“Gosh!” Brad exclaimed. “We’re getting out of here!”

At that same moment, someone tapped on the glass pane at the rear of the shack.

Whirling around, Brad and Dan saw Chips’ contorted face pressed against the window. He motioned frantically.

Seizing the tin box, Brad and Dan started for the door.

Before they could reach it, heavy footsteps were heard outside.

Then the door creaked back, and the tramp stood there blocking the exit!

CHAPTER 18
Pursuit

“Well!” said the tramp unpleasantly. “Visitors, I see!”

Dan gripped the tin box, standing close beside Brad.