XXII - The Sheriff on Board
XXIII - On To the Camp
XXIV - The Raid
XXV - Andy Gets His Reward




Chapter 1 - An Explosion



"Are you all ready, Tom?"

"All ready, Mr. Sharp," replied a young man, who was stationed near
some complicated apparatus, while the questioner, a dark man, with a
nervous manner, leaned over a large tank.

"I'm going to turn on the gas now," went on the man. "Look out for
yourself. I'm not sure what may happen."

"Neither am I, but I'm ready for it. If it does explode it can't do
much damage."

"Oh, I hope it doesn't explode. We've had so much trouble with the
airship, I trust nothing goes wrong now."

"Well, turn, on the gas, Mr. Sharp," advised Tom Swift. "I'll watch
the pressure gauge, and, if it goes too high, I'll warn you, and you
can shut it off."