150
TOM SWIFT AND HIS GIANT CANNON
He looked at the horseman anxiously. The rider came nearer and nearer, wildly waving his flag. He seemed to be shouting something, but his words could not be made out. Finally he came near enough to be heard.
"The dam! The dam!" he cried. "It's bursting. Your shots have hastened it. The cracks are widening. You'd better get away!" And he galloped on.
"Bless my toilet soap!" gasped Mr. Damon.
"I was afraid of this!" murmured Tom. "But, since our shots have hastened the disaster, maybe we can avert it."
"How?" demanded Ned.
"I'll show you. All hands come here and we'll shift this gun. I want it to point at that big white stone!" and he indicated an immense boulder, well up the valley, near the place where the two great gulches joined.
