Hilton bowed and turned away, grumbling that workmen were always blamed for everything that took place, whether they were guilty or not. Mr. Havens and the boys sat watching each other with astonishment showing in their eyes for at least a minute after the departure of the night-watchman. Havens was the first to speak.

“What do you make of that, boys?” he asked.

“It seems to me to be a problem easy of solution,” Ben answered. “The men who planned the destruction of the building and the death of those sleeping in it employed this man to do their dirty work. He set fire to the building, but didn’t get away in time. The captured man is undoubtedly a fellow not to be trusted, so the chief incendiary shot him in order to close his lips.”

“It strikes me,” Mr. Havens said, with a laugh, “that you ought to make a pretty good detective. In my opinion, you have grasped the situation exactly.”

“Oh, Ben is the only original Sherlock Holmes,” laughed Jimmie. “Give him a piece of rock and a blade of grass and he’ll tell you how the world was made! He’s got the deduction stunt down to cases!”

“You bet he has!” laughed Carl. “Don’t you remember how he figured out the Devil’s Pool down in Mexico?”

“I guess you all had a hand in that Devil’s Pool proposition,” laughed Ben. “But, honest, now,” he continued, “don’t you think the man was shot in order to prevent his snitching on his friends?”

“He certainly was!” answered Mr. Havens. “And now,” he continued, rising from his chair and moving toward the door, “it remains for us to determine whether he is dead. If he is dead, that settles the matter so far as we’re concerned. If he isn’t, he may be induced by the use of the third degree to betray his accomplices.”

“Huh!” laughed Jimmie. “I wouldn’t put a sheep-stealing dog through the third degree! They tried it on me once,” he continued, “when they found me sleeping in a dry goods box in an alley near where a burglary had been committed. They kept me without sleep or food for two days and two nights, though they had all I knew about the case the first minute.”

“You’re right about the cops,” Carl laughed. “When I write a book descriptive of the criminal classes in the United States, I’m going to give the police the place of honor in the book. If anybody should ask you, you just say that the leading criminal class in the United States revolves around police headquarters.”