"It matters a great deal to you."

"Never mind. What you have to do is to secure one of Vincent's machines and try for this race. If you win the prize you will have heaps of money to search for the gang. But why doesn't Miss Moon----"

"I don't take Lillian's money," said Dan curtly, and blushed in his turn. "It is a good idea, Freddy. How can I get hold of the machine?"

"I shall take you up to Hillshire next week, and you can see Vincent for yourself. He can talk to you, and----"

"And you can talk to the niece. What's her name?"

"Oh, shut up and get out," said Laurance, turning away, "you're interrupting my work."

"Going to write a letter to the beloved," said Dan, leisurely making for the door. "All right, old son, I'll go. You know my address, so write me when you want me. I'd like to see Vincent's machines, as I hear he has made several good improvements, and everything tells in a race. Salaam!"

"Keep your eyes open," Laurance called after him; "remember Monsieur Chance may prove to be our best friend." Dan departed, shrugging his shoulders. "I don't believe in heaven-sent miracles," were his last words. But they were wasted on Freddy, for that alert young man was already buried in his work. It was painful to witness such industry, in Halliday's opinion. 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]