“So you’re going to fight, eh?” Hobo Johnny said in an ugly tone. “I’ll see about that!”

Without warning the trap door was slammed shut and locked from the outside!

CHAPTER XX

The Escape

“LET us out of here!” Frank shouted at Hobo Johnny.

“You can’t get away with this!” Joe yelled.

The man on the water tower roof gave a loud guffaw. “You think I ain’t got no brains. Well, I got enough to know when I’m well off. I ain’t in no hurry to collect that treasure you found in the tower. A few days from now will be all right for me to sell it.”

“A few days from now?” Joe exclaimed, horrified. “By that time we’ll be suffocated or die of starvation.”

Frank put an arm around his impulsive brother’s shoulder. In a low tone he said, “We won’t do either, Joe. I don’t think it’s going to be too hard to get out of here. If not by the trap door, we’ll hack our way out through one side of the tank.”

Joe calmed down and both boys became silent. This seemed to worry Hobo Johnny, who called down, “What’re you guys up to?”