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TOM SWIFT AND HIS GIANT CANNON
chum. "Show him in, Koku, and you come in too."
But the man who entered at once disarmed suspicion. He was evidently a workman from the dam above, and his manner was strangely excited.
"You folks had better get out of here!" he exclaimed.
"Why?" asked Tom, wondering what was going to happen.
"Why? Because our dam is going to burst within a few hours. I've been sent to warn the folks in town in time to let them take to the hills. You'd better move your outfit. The dam can't last twenty-four hours longer!"
