The Valley of Fear

heard the gunshot⁠—of the man Barker and of the woman Douglas. When on the top of this I am able to show that the blood mark on the windowsill was deliberately placed there by Barker, in order to give a false clue to the police, you will admit that the case grows dark against him.
“Now we have to ask ourselves at what hour the murder actually did occur. Up to half-past ten the servants were moving about the house; so it was certainly not before that time. At a quarter to eleven they had all gone to their rooms with the exception of Ames, who was in the pantry. I have been trying some experiments after you left us this afternoon, and I find that no noise which MacDonald can make in the study can penetrate to me in the pantry when the doors are all shut.
“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.
“We will suppose that this couple are united by the bonds of a guilty love, and that they have determined to get rid of the man who stands between them. It is a large supposition; for discreet inquiry among servants and others has failed to corroborate it in any way. On the contrary, there is a good deal of evidence that the Douglases were very attached to each other.”
“That, I am sure, cannot be true.” said I, thinking of the beautiful smiling face in the garden.
“Well at least they gave that impression. However, we will suppose that they are an extraordinarily astute couple, who deceive everyone upon this point, and conspire to murder the husband. He happens to be a man over whose head some danger hangs⁠—”
“We have only their word for that.”
Holmes looked thoughtful. “I see, Watson. You are sketching out a theory by which everything they say from the beginning is false. According to your idea, there was never any hidden menace, or secret society, or Valley of Fear, or Boss MacSomebody, or anything else. Well, that is a good sweeping generalization. Let us see what that brings us to. They invent this theory to account for the crime. They then play up to the idea by leaving this bicycle in the park as proof of the existence of some outsider. The stain on the windowsill conveys the same idea. So does the card on the body, which might have been prepared in the house. That all fits into your hypothesis, Watson. But now we come on the nasty, angular, uncompromising bits which won’t slip into their places. Why a cutoff shotgun of all weapons⁠—and an American one at that? How could they be so sure that the sound of it would not bring someone on to them? It’s a mere chance as it is that  Mrs. Allen did not start out to inquire for the slamming door. Why did your guilty couple do all this, Watson?”
“I confess that I can’t explain it.”
“Then again, if a woman and her lover conspire to murder a husband, are they going to advertise their guilt by ostentatiously removing his wedding