“You put it very clearly,” said Holmes. “I am inclined to agree with you.”

“Well, then, we are driven back to the theory that it was done by someone from outside. We are still faced with some big difficulties; but anyhow they have ceased to be impossibilities. The man got into the house between four-thirty and six; that is to say, between dusk and the time when the bridge was raised. There had been some visitors, and the door was open; so there was nothing to prevent him. He may have been a common burglar, or he may have had some private grudge against Mr. Douglas. Since Mr. Douglas has spent most of his life in America, and this shotgun seems to be an American weapon, it would seem that the private grudge is the more likely theory. He slipped into this room because it was the first he came to, and he hid behind the curtain. There he remained until past eleven at night. At that time Mr. Douglas entered the room. It was a short interview, if there were any interview at all; for Mrs. Douglas declares that her husband had not left her more than a few minutes when she heard the shot.”

“The candle shows that,” said Holmes.

“Exactly. The candle, which which was a new one, is not burned more than half an inch. He must have placed it on the table before he was attacked; otherwise, of course, it would have fallen when he fell. This shows that he was not attacked the instant that he entered the room. When Mr. Barker arrived the candle was lit and the lamp was out.”

“That’s all clear enough.”

“Well, now, we can reconstruct things on those lines. Mr. Douglas enters the room. He puts down the candle. A man appears from behind the curtain. He is armed with this gun. He demands the wedding ring — Heaven only knows why, but so it must have been. Mr. Douglas gave it up. Then either in cold blood or in the course of a struggle — Douglas may have gripped the hammer that was found upon the mat — he shot Douglas in this horrible way. He dropped his gun and also it would seem this queer card — V. V. 341, whatever that may mean — and he made his escape through the window and across the moat at the very moment when Cecil Barker was discovering the crime. How’s that, Mr. Holmes?”

“Very interesting, but just a little unconvincing.”

“Man, it would be absolute nonsense if it wasn’t that anything else is even worse!” cried MacDonald. “Somebody killed the man, and whoever it was I could clearly prove to you that he should have done it some other way. What does he mean by allowing his retreat to be cut off like that? What does he mean by using a shotgun when silence was his one chance of escape? Come, Mr. Holmes, it’s up to you to give us a lead, since you say Mr. White Mason’s theory is unconvincing.”

Holmes had sat intently observant during this long discussion, missing no word that was said, with his keen eyes darting to right and to left, and his forehead wrinkled with speculation.

I did not pause to argue over this atrocious sentiment.

“I shall be back in an hour or two,” I remarked.

“All right! Good luck! But, I say, if you are crossing the river you may as well return Toby, for I don’t think it is at all likely that we shall have any use for him now.”

I took our mongrel accordingly and left him, together with a half-sovereign, at the old naturalist’s in Pinchin Lane. At Camberwell I found Miss Morstan a little weary after her night’s adventures but very eager to hear the news. Mrs. Forrester, too, was full of curiosity. I told them all that we had done, suppressing, however, the more dreadful parts of the tragedy. Thus although I spoke of Mr. Sholto’s death, I said nothing of the exact manner and method of it. With all my omissions, however, there was enough to startle and amaze them.

“It is a romance!” cried Mrs. Forrester. “An injured lady, half a million in treasure, a black cannibal, and a wooden-legged ruffian. They take the place of the conventional dragon or wicked earl.”

“And two knight-errants to the rescue,” added Miss Morstan with a bright glance at me.

“Why, Mary, your fortune depends upon the issue of this search. I don’t think that you are nearly excited enough. Just imagine what it must be to be so rich and to have the world at your feet!”

It sent a little thrill of joy to my heart to notice that she showed no sign of elation at the prospect. On the contrary, she gave a toss of her proud head, as though the matter were one in which she took small interest.

“It is for Mr. Thaddeus Sholto that I am anxious,” she said. “Nothing else is of any consequence; but I think that he has behaved most kindly and honourably throughout. It is our duty to clear him of this dreadful and unfounded charge.”

It was evening before I left Camberwell, and quite dark by the time I reached home. My companion’s book and pipe lay by his chair, but he had disappeared. I looked about in the hope of seeing a note, but there was none.

“I suppose that Mr. Sherlock Holmes has gone out,” I said to Mrs. Hudson as she came up to lower the blinds.

“No, sir. He has gone to his room, sir. Do you know, sir,” sinking her voice into an impressive whisper, “I am afraid for his health.”

“Why so, Mrs. Hudson?”

“Well, he’s that strange, sir. After you was gone he walked and he walked, up and down, and up and down, until I was weary of the sound of his footstep. Then I heard him talking to himself and muttering, and every time the bell rang out he came on the stairhead, with ‘What is that, Mrs. Hudson?’ And now he has slammed off to his room, but I can hear him walking away the same as ever. I hope he’s not going to be ill, sir. I ventured to say something to him about cooling medicine, but he turned on me, sir, with such a look that I don’t know how ever I got out of the room.”