"That's a fact!" cried Elmer.
The boys now stepped to the door and listened again, attracted by the sound of running feet.
"There's something doing!" exclaimed Sandy. "When Tommy comes home on a run, there's always something going on."
Directly the boys came panting up, stopping in the doorway to look behind them. They were both well winded.
"That bum detective back there," Tommy exclaimed, as soon as he could catch his breath, "is putting in dynamite enough to blow up the whole mine. He's attaching a long fuse, so he can get out before the explosion comes. We cried to get down far enough to choke off the fuse, but couldn't do it. In just about another minute, you'll hear something like a Fourth of July celebration!"
Chapter XVII
THE SIGNS IN STONES
"We thought he'd send the shot off before we got up the ladders!" exclaimed Dick. "We're expecting to hear the roar of it every minute now!"
"Perhaps something went wrong," suggested Will.