"No, no! It will make you late at the store. Maybe you'll be going up there again some other day and can take me along." "I'm afraid not," replied McPhearson, ruefully. "At least I hope not. If Seventeen behaves herself as I expect she will, I shall not be needed. Well! Well! I am sorry. It wasn't very thoughtful of me." They walked on and hailing a bus climbed aboard it. The vehicle was crowded and they made their way in with difficulty, jostling aside its closely packed occupants as they entered. "Lots of these people will be leaving at the next stop," McPhearson remarked. "They always do." The prediction was true. At the next corner the passengers poured out, leaving the seats only thinly filled. As Christopher sank into a seat and drew a long breath of relief his eye wandered idly over those sitting near him, and a stranger opposite arrested his attention. [Illustration: What was it that rendered the figure so familiar? _Page_ 103.] He was a working man shabbily clothed, and wearing a dingy brown ulster and slouch hat. Between his feet was a much worn leather bag which obviously contained tools. His hair was gray and so was the grizzled beard that partially concealed his features. But it was none of these that held the boy's attention. Something in the way the fellow's collar was pulled up and his hat pulled down; something in the gesture with which he moved his hands to turn his paper aroused a vague memory. Fascinated, the lad watched. What was it that rendered the figure so familiar? He had never seen the man before in his life--he was certain of that. And yet, had he? And if so, where? What was the haunting association that held him spellbound and made it impossible for him to remove his gaze from this person whose features were almost entirely screened from view behind the outspread pages of the morning _Herald_? Christopher looked away. Of course he didn't know the fellow. Why stare at him? But do what he would, back came his gaze to the same brown-ulstered traveler. Then the bus lurched, stopped suddenly, and he knew! The man had lowered his paper, and as he turned his head to look out, the boy saw on his right cheek, almost concealed by hat and whiskers, a telltale scar. The shock of the discovery was so great that it was with difficulty Chris checked a cry of surprise. Yes, it was the hero of the ring adventure--there could be no possible doubt of it. And yet, after all, was it? This person's hair was white and his whiskers too; he was shabby and wore spectacles. The lad began to doubt the conclusion to which he had leaped. It couldn't be Stuart! A diamond robber would not be journeying about in an electric bus in broad daylight. Such a notion was absurd. Probably it was merely a mannerism that had suggested him.