"I wonder if it can be--yes, it's the same man--the mysterious man we've been after so long!" murmured Fenn. "He's going in that store! I hope he didn't see me." He got behind a couple of men who were close to the window, and watched until he had seen the person he had observed close the door, after entering the store. Then Fenn turned to address his chums who were now at his side.