What Mrs. Manderson actually said, she was unable to recollect at the inquest. She thinks she asked her supposed husband whether he had had a good run in the car. And now what does the unknown do? Here, I think, we come to a supremely significant point. Not only does he—standing rigid there, as I picture him, before the dressing-table, listening to the sound of his own leaping heart—not only does he answer the lady in the voice of Manderson; he volunteers an explanatory statement. He tells her that he has, on a sudden inspiration, sent Marlowe in the car to Southampton; that he has sent him to bring back some important information from a man leaving for Paris by the steamboat that morning. Why these details from a man who had long been uncommunicative to his wife, and that upon a point scarcely likely to interest her? Why these details _about Marlowe?_ Having taken my story so far, I now put forward the following definite propositions: that between a time somewhere about ten, when the car started, and a time somewhere about eleven, Manderson was shot—probably at a considerable distance from the house, as no shot was heard; that the body was brought back, left by the shed, and stripped of its outer clothing; that at some time round about eleven o’clock a man who was not Manderson, wearing Manderson’s shoes, hat, and jacket, entered the library by the garden window; that he had with him Manderson’s black trousers, waistcoat, and motor-coat, the denture taken from Manderson’s mouth, and the weapon with which he had been murdered; that he concealed these, rang the bell for the butler, and sat down at the telephone with his hat on and his back to the door; that he was occupied with the telephone all the time Martin was in the room; that on going up to the bedroom floor he quietly entered Marlowe’s room and placed the revolver with which the crime had been committed—Marlowe’s revolver—in the case on the mantelpiece from which it had been taken; and that he then went to Manderson’s room, placed Manderson’s shoes outside the door, threw Manderson’s garments on a chair, placed the denture in the bowl by the bedside, and selected a suit of clothes, a pair of shoes, and a tie from those in the bedroom. Here I will pause in my statement of this man’s proceedings to go into a question for which the way is now sufficiently prepared: _Who was the false Manderson?_ Reviewing what was known to me, or might almost with certainty be surmised, about that person, I set down the following five conclusions: (1.) He had been in close relations with the dead man. In his acting before Martin and his speaking to Mrs. Manderson he had made no mistake. (2.) He was of a build not unlike Manderson’s, especially as to height and breadth of shoulder, which mainly determine the character of the back of a seated figure when the head is concealed and the body loosely clothed. But his feet were larger, though not greatly larger, than Manderson’s.