“Perhaps they are up to one of their old tricks,” said Bob to himself. “I ought to notify the police and have them bagged without delay.”

He heard the men still talking, and, anxious to make out what was being said, he tiptoed his way to the door and listened.

“You are sure Lawrence is nowhere about?” he heard Barker say.

“Positive,” returned Casco. “He got a letter calling him to Middletown, and he left on the four-fifteen train.”

“Then we have the whole office to ourselves.”

“We have.”

“Then lock the door and come to business.”

“Yis, it’s hoigh toime we did that same,” growled Grogan. “’Tis a lot ov toime we’ve been afther wastin’.”

“Slow but sure, Mike,” laughed Casco. “You mustn’t forget that the police are on our heels.”

“I doubt if they know we are in Stampton,” put in Barker. “The old Nick take that boy! If it hadn’t been for him they wouldn’t know who stole the stuff.”