“What has bothered me,” continued Battle, “was wondering what had become of M. Lemoine here. I’d had word from Paris that he was on his way over to work with me, and I couldn’t make out why he hadn’t turned up.”

“I must indeed apologize,” said Lemoine. “You see, I arrived on the morning after the murder. It occurred to me at once that it would be as well for me to study things from an unofficial standpoint without appearing officially as your colleague. I thought that great possibilities lay that way. I was, of course, aware that I was bound to be an object of suspicion, but that in a way furthered my plan since it would not put people I was after on their guard. I can assure you that I have seen a good deal that is interesting in the last two days.”

“But look here,” said Bill, “what really did happen last night?”

“I am afraid,” said M. Lemoine, “that I gave you rather violent exercise.”