And there my thinking was interrupted by the realization of a thing that had escaped me before. So strong had been the influence of the unquestioned assumption that it was Manderson who was present that night, that neither I nor, as far as I know, anyone else had noted the point. Martin had not seen the man’s face; nor had Mrs. Manderson.
Mrs. Manderson (judging by her evidence at the inquest, of which, as I have said, I had a full report made by the Record stenographers in court) had not seen the man at all. She hardly could have done, as I shall show presently. She had merely spoken with him as she lay half asleep, resuming a conversation which she had had with her living husband about an hour before. Martin, I perceived, could only have seen the man’s back, as he sat crouching over the telephone; no doubt a characteristic pose was imitated there. And the man had worn his hat, Manderson’s broad-brimmed hat! There is too much character in the back of a head and neck. The unknown, in fact, supposing him to have been of about Manderson’s build, had had no need for any disguise, apart from the jacket and the hat and his powers of mimicry.
I paused there to contemplate the coolness and ingenuity of the man. The thing, I now began to see, was so safe and easy, provided that his mimicry was good enough, and that his nerve held. Those two points assured, only some wholly unlikely accident could unmask him.
To come back to my puzzling out of the matter as I sat in the dead man’s bedroom with the telltale shoes before me. The reason for the entrance by the window instead of by the front door will already have occurred to anyone reading this. Entering by the door, the man would almost certainly have been heard by the sharp-eared Martin in his pantry just across the hall; he might have met him face to face.
Then there was the problem of the whisky. I had not attached much importance to it; whisky will sometimes vanish in very queer ways in a household of eight or nine persons; but it had seemed strange that it should go in that way on that evening. Martin had been plainly quite dumbfounded by the fact. It seemed to me now that many a man—fresh, as this man in all likelihood was, from a bloody business, from the unclothing of a corpse, and with a desperate part still to play—would turn to that decanter as to a friend. No doubt he had a drink before sending for Martin; after making that trick with ease and success, he probably drank more.
But he had known when to stop. The worst part of the enterprise was before him: the business—clearly of such vital importance to him, for whatever reason—of shutting himself in Manderson’s room and preparing a body of convincing evidence of its having been occupied by Manderson; and this with the risk—very slight, as no doubt he understood, but how unnerving!—of the woman on the other side of the half-open door awaking and somehow discovering him. True, if he kept out of her limited field of vision from the bed, she could only see him by getting up and going to the door. I found that to a person lying in her bed, which stood with its head to the wall a little beyond the door, nothing was visible through the doorway but one of the cupboards by Manderson’s bed-head. Moreover, since this man knew the ways of the household, he would think it most likely that Mrs. Manderson was asleep. Another point with him, I guessed, might have been the estrangement between the husband and wife, which they had tried to cloak by keeping up, among other things, their usual practice of sleeping in connected rooms, but which was well known to all who had anything to do with them. He would hope from this that if Mrs. Manderson heard him, she would take no notice of the supposed presence of her husband.
So, pursuing my hypothesis, I followed the unknown up to the bedroom, and saw him setting about his work. And it was with a catch in my own breath that I thought of the hideous shock with which he must have heard the sound of all others he was dreading most: the drowsy voice from the adjoining room.
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,
