“It is otherwise, however, from the housekeeper’s room. It is not so far down the corridor, and from it I could vaguely hear a voice when it was very loudly raised. The sound from a shotgun is to some extent muffled when the discharge is at very close range, as it undoubtedly was in this instance. It would not be very loud, and yet in the silence of the night it should have easily penetrated to Mrs. Allen’s room. She is, as she has told us, somewhat deaf; but none the less she mentioned in her evidence that she did hear something like a door slamming half an hour before the alarm was given. Half an hour before the alarm was given would be a quarter to eleven. I have no doubt that what she heard was the report of the gun, and that this was the real instant of the murder. “If this is so, we have now to determine what Barker and Mrs. Douglas, presuming that they are not the actual murderers, could have been doing from quarter to eleven, when the sound of the shot brought them down, until quarter past eleven, when they rang the bell and summoned the servants. What were they doing, and why did they not instantly give the alarm? That is the question which faces us, and when it has been answered we shall surely have gone some way to solve our problem.” “I am convinced myself,” said I, “that there is an understanding between those two people. She must be a heartless creature to sit laughing at some jest within a few hours of her husband’s murder.” “Exactly. She does not shine as a wife even in her own account of what occurred. I am not a whole-souled admirer of womankind, as you are aware, Watson, but my experience of life has taught me that there are few wives, having any regard for their husbands, who would let any man’s spoken word stand between them and that husband’s dead body. Should I ever marry, Watson, I should hope to inspire my wife with some feeling which would prevent her from being walked off by a housekeeper when my corpse was lying within a few yards of her. It was badly stage-managed; for even the rawest investigators must be struck by the absence of the usual feminine ululation. If there had been nothing else, this incident alone would have suggested a prearranged conspiracy to my mind.” “You think then, definitely, that Barker and Mrs. Douglas are guilty of the murder?” “There is an appalling directness about your questions, Watson,” said Holmes, shaking his pipe at me. “They come at me like bullets. If you put it that Mrs. Douglas and Barker know the truth about the murder, and are conspiring to conceal it, then I can give you a whole-souled answer. I am sure they do. But your more deadly proposition is not so clear. Let us for a moment consider the difficulties which stand in the way.