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.