In an inquiring frame of mind, the amateur detective strolled along Fleet Street, thinking of Lillian instead of keeping his wits about him, as Freddy had requested. It seemed impossible that he should strike on a clue without deliberately searching for it, which he did not feel inclined to do at the moment. Monsieur Chance, indeed! He was a mythical personage in whom this sceptical young man did not believe. Besides love dominated his thoughts to the exclusion of minor matters, and he dreamed about his darling all along the Strand. Thus he did not look where he was going, and stumbled into the midst of a Charing Cross crowd, where a motor had broken down after colliding with a 'bus. A policeman was conversing with the chauffeur and the 'bus driver, who were conversing abusively with one another. The crowd blocked the street and stopped the traffic in order to enjoy the conversation, which left nothing to be desired in the way of free language. Dan halted idly, as a spectator, not because he wished to be one, but for the very simple reason that he could not get through the crowd into Trafalgar Square. Thrust up against one man, and wedged in by two others, and surrounded by hundreds, he grumbled at the delay, and peered over shoulders to see when the incident would end. As he did so, he suddenly in his mind's eye saw a vision of Sir Charles lying dead in the well-lighted library. While wondering why he thought of the crime at this particular moment, he became aware that a familiar scent assailed his nostrils, the scent about which he had talked to Durwin and Tenson and Laurance. Nosing like a hound, he tried to find the person from whom it emanated, and almost immediately later the man turned, and Dan found himself face to face with Marcus Penn. CHAPTER V MUDDY WATER The secretary of the late Sir Charles Moon smiled irresolutely when he recognized Dan. That young gentleman, who thought Penn a weak-kneed idiot, had never taken much notice of him, but for the fact that he was perfumed with the unusual scent would not have spoken to him now. But as he looked at the lank creature with his yellow face, and scanty moustache, he guessed that he was exactly the effeminate sort of person who would use perfume. What he wished to know was why he affected this particular kind of fragrance, and whence he obtained it. To gain the information he pretended a friendliness for the man he was far from feeling. Dan, strong, virile, and self-confident, was not altogether just to Penn, who was not responsible for his pallid looks and weak character. But Halliday was not a perfect individual by any means, and had yet to learn that the weak are meant to be protected and helped instead of being despised. "You here, Mr. Penn?" said Dan, thus formal to mark the difference between them.