“What’s that?” the boy heard one of the men ask.

“I don’t know,” was the reply.

“We’d better cut it out, for to-night,” said another. “I believe someone is watching us.”

“Nonsense! who can it be?” remarked a voice.

“I don’t know, but I have a feeling that we are being observed. Besides, there are some persons in this house who I firmly believe are suspicious of us.”

“You’re getting nervous, old man,” was the remark of one who, from the peculiar voice, had not before spoken. “But perhaps we had better stop work for to-night.”

Then the light died out, and Larry could see no more. He could hear the men moving about, but, in a few minutes it all became quiet, and there were no further sounds from below.

“I wonder what they can be up to, that they don’t want anyone to see; that they are afraid of having known,” mused Larry.

Puzzling over these things, Larry finally went to bed. He could not get to sleep for some time, thinking over what he had seen. He wondered if he ought to tell Mr. Newton or someone about the matter, and half resolved to inform his reporter friend of what had taken place. Then he recollected that he had no proof of anything wrong, and he realized that to make charges without this, or even a good idea of what the men were up to, would be foolish.

“I’ll say nothing about it,” thought Larry, “but I’ll keep my eyes open. I’m glad there’s a crack in my floor.”