Apart from the central mystery of Manderson’s having arisen long before his usual hour to go out and meet his death, there were two minor points of oddity about this affair which, I suppose, must have occurred to thousands of those who have read the accounts in the newspapers: points apparent from the very beginning. The first of these was that, whereas the body was found at a spot not thirty yards from the house, all the people of the house declared that they had heard no cry or other noise in the night. Manderson had not been gagged; the marks on his wrists pointed to a struggle with his assailant; and there had been at least one pistol-shot. (I say at least one, because it is the fact that in murders with firearms, especially if there has been a struggle, the criminal commonly misses his victim at least once.) This odd fact seemed all the more odd to me when I learned that Martin the butler was a bad sleeper, very keen of hearing, and that his bedroom, with the window open, faced almost directly toward the shed by which the body was found. The second odd little fact that was apparent from the outset was Manderson’s leaving his dental plate by the bedside. It appeared that he had risen and dressed himself fully, down to his necktie and watch and chain, and had gone out of doors without remembering to put in this plate, which he had carried in his mouth every day for years, and which contained all the visible teeth of the upper jaw. It had evidently not been a case of frantic hurry; and even if it had been, he would have been more likely to forget almost anything than this denture. Any one who wears such a removable plate will agree that the putting it in on rising is a matter of second nature. Speaking as well as eating, to say nothing of appearances, depend upon it. Neither of these queer details, however, seemed to lead to anything at the moment. They only awakened in me a suspicion of something lurking in the shadows, something that lent more mystery to the already mysterious question how and why and through whom Manderson met his end. With this much of preamble I come at once to the discovery which, in the first few hours of my investigation, set me upon the path which so much ingenuity had been directed to concealing.