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. I have already described Manderson's bedroom, the rigorous simplicity of its furnishings, contrasted so strangely with the multitude of clothes and shoes, and the manner of its communication with Mrs. Manderson's room. On the upper of the two long shelves on which the shoes were ranged I found, where I had been told I should find them, the pair of patent leather shoes which Manderson had worn on the evening before his death. I had glanced over the row, not with any idea of their giving me a clue, but merely because it happens that I am a judge of shoes, and all these shoes were of the very best workmanship.