He says they act very suspiciously, and that a boy who works for him overheard Crabtree and Sobber talking about us.

I have sent for a detective to come out from the city and watch them for a while.

If anything new develops I will let you know." "Now what in the world can old Crabtree and Sobber be up to ?" asked Sam, after all had read the communication.
"Up to some trick, I'll bet a new hat," declared Tom.

"I am glad dad sent for the detective.

I hope he catches them red-handed at something, and locks them up." "They certainly ought to be locked up," was Dick's comment.
The boys studied hard that evening and by ten o'clock all were tired out and ready to go to bed.