“Exactly. This end, which we can examine, is frayed. He was cunning enough to do that with his knife. But the other end is not frayed. You could not observe that from here, but if you were on the mantelpiece you would see that it is cut clean off without any mark of fraying whatever. You can reconstruct what occurred. The man needed the rope. He would not tear it down for fear of giving the alarm by ringing the bell. What did he do? He sprang up on the mantelpiece, could not quite reach it, put his knee on the bracket - you will see the impression in the dust - and so got his knife to bear upon the cord. I could not reach the place by at least three inches - from which I infer that he is at least three inches a bigger man than I. Look at that mark upon the seat of the oaken chair! What is it?”

“Blood.”

“Undoubtedly it is blood. This alone puts the lady’s story out of court. If she were seated on the chair when the crime was done, how comes that mark? No, no, she was placed in the chair after the death of her husband. I’ll wager that the black dress shows a corresponding mark to this. We have not yet met our Waterloo, Watson, but this is our Marengo, for it begins in defeat and ends in victory. I should like now to have a few words with the nurse, Theresa. We must be wary for a while, if we are to get the information which we want.”

She was an interesting person, this stern Australian nurse - taciturn, suspicious, ungracious, it took some time before Holmes’s pleasant manner and frank acceptance of all that she said thawed her into a corresponding amiability. She did not attempt to conceal her hatred for her late employer.

“Yes, sir, it is true that he threw the decanter at me. I heard him call my mistress a name, and I told him that he would not dare to speak so if her brother had been there. Then it was that he threw it at me. He might have thrown a dozen if he had but left my bonny bird alone. He was forever ill-treating her, and she too proud to complain. She will not even tell me all that he has done to her. She never told me of those marks on her arm that you saw this morning, but I know very well that they come from a stab with a hatpin. The sly devil - God forgive me that I should speak of him so, now that he is dead! But a devil he was, if ever one walked the earth. He was all honey when first we met him - only eighteen months ago, and we both feel as if it were eighteen years. She had only just arrived in London. Yes, it was her first voyage - she had never been from home before. He won her with his title and his money and his false London ways. If she made a mistake she has paid for it, if ever a woman did. What month did we meet him? Well, I tell you it was just after we arrived. We arrived in June, and it was July. They were married in January of last year. Yes, she is down in the morning-room again, and I have no doubt she will see you, but you must not ask too much of her, for she has gone through all that flesh and blood will stand.”

Lady Brackenstall was reclining on the same couch, but looked brighter than before. The maid had entered with us, and began once more to foment the bruise upon her mistress’s brow.

“I hope,” said the lady, “that you have not come to cross-examine me again?”

“No,” Holmes answered, in his gentlest voice, “I will not cause you any unnecessary trouble, Lady Brackenstall, and my whole desire is to make things easy for you, for I am convinced that you are a much-tried woman. If you will treat me as a friend and trust me, you may find that I will justify your trust.”

“What do you want me to do?”

“To tell me the truth.”

“Mr. Holmes!”