Arthur Doyle - The Case Book of Sherlock Holmes

"That process," said I, "starts upon the supposition that when you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth. It may well be that several explanations remain, in which case one tries test after test until one or other of them has a convincing amount of support. We will now apply this principle to the case in point. As it was first presented to me, there were three possible explanations of the seclusion or incarceration of this gentleman in an outhouse of his father's mansion. There was the explanation that he was in hiding for a crime, or that he was mad and that they wished to avoid an asylum, or that he had some disease which caused his segregation. I could think of no other adequate solutions. These, then, had to be sifted and balanced against each other.

"The criminal solution would not bear inspection. No unsolved crime had been reported from that district. I was sure of that. If it were some crime not yet discovered, then clearly it would be to the interest of the family to get rid of the delinquent and send him abroad rather than keep him concealed at home. I could see no explanation for such a line of conduct.

"Insanity was more plausible. The presence of the second person in the outhouse suggested a keeper. The fact that he locked the door when he came out strengthened the supposition and gave the idea of constraint. On the other hand, this constraint could not be severe or the young man could not have got loose and come down to have a look at his friend. You will remember, Mr. Dodd, that I felt round for points, asking you, for example, about the paper which Mr. Kent was reading. Had it been the Lancet or the British Medical Journal it would have helped me. It is not illegal, however, to keep a lunatic upon private premises so long as there is a qualified person in attendance and that the authorities have been duly notified. Why, then, all this desperate desire for secrecy? Once again I could not get the theory to fit the facts.

"There remained the third possibility, into which, rare and unlikely as it was, everything seemed to fit. Leprosy is not uncommon in South Africa. By some extraordinary chance this youth might have contracted it. His people would be placed in a very dreadful position, since they would desire to save him from segregation. Great secrecy would be needed to prevent rumors from getting about and subsequent interference by the authorities. A devoted medical man, if sufficiently paid, would easily be found to take charge of the sufferer. There would be no reason why the latter should not be allowed freedom after dark. Bleaching of the skin is a common result of the disease. The case was a strong one – so strong that I determined to act as if it were actually proved. When on arriving here I noticed that Ralph, who carries out the meals, had gloves which are impregnated with disinfectants, my last doubts were removed. A single word showed you, sir, that your secret was discovered, and if I wrote rather than said it, it was to prove to you that my discretion was to be trusted."

I was finishing this little analysis of the case when the door was opened and the austere figure of the great dermatologist was ushered in. But for once his sphinx-like features had relaxed and there was a warm humanity in his eyes. He strode up to Colonel Emsworth and shook him by the hand.

"It is often my lot to bring ill-tidings and seldom good," said he. "This occasion is the more welcome. It is not leprosy."

"What?"

"A well-marked case of pseudo-leprosy or ichthyosis, a scalelike affection of the skin, unsightly, obstinate, but possibly curable, and certainly noninfective. Yes, Mr. Holmes, the coincidence is a remarkable one. But is it coincidence? Are there not subtle forces at work of which we know little? Are we assured that the apprehension from which this young man has no doubt suffered terribly since his exposure to its contagion may not produce a physical effect which simulates that which it fears? At any rate, I pledge my professional reputation – But the lady has fainted! I think that Mr. Kent had better be with her until she recovers from this joyous shock."

It was pleasant to Dr. Watson to find himself once more in the untidy room of the first floor in Baker Street which had been the starting-point of so many remarkable adventures. He looked round him at the scientific charts upon the wall, the acid-charred bench of chemicals, the violin-case leaning in the corner, the coal-scuttle, which contained of old the pipes and tobacco. Finally, his eyes came round to the fresh and smiling face of Billy, the young but very wise and tactful page, who had helped a little to fill up the gap of loneliness and isolation which surrounded the saturnine figure of the great detective.

"It all seems very unchanged, Billy. You don't change, either. I hope the same can be said of him?"

Billy glanced with some solicitude at the closed door of the bedroom.

"I think he's in bed and asleep," he said.

It was seven in the evening of a lovely summer's day, but Dr. Watson was sufficiently familiar with the irregularity of his old friend's hours to feel no surprise at the idea.

"That means a case, I suppose?"

"Yes, sir, he is very hard at it just now. I'm frightened for his health. He gets paler and thinner, and he eats nothing. 'When will you be pleased to dine, Mr. Holmes?' Mrs. Hudson asked. 'Seven-thirty, the day after tomorrow,' said he. You know his way when he is keen on a case."

"Yes, Billy, I know."

"He's following someone. Yesterday he was out as a workman looking for a job. Today he was an old woman. Fairly took me in, he did, and I ought to know his ways by now." Billy pointed with a grin to a very baggy parasol which leaned against the sofa. "That's part of the old woman's outfit," he said.

"But what is it all about, Billy?"

Billy sank his voice, as one who discusses great secrets of State. "I don't mind telling you, sir, but it should go no farther. It's this case of the Crown diamond."

"What – the hundred-thousand-pound burglary?"

"Yes, sir. They must get it back, sir. Why, we had the Prime Minister and the Home Secretary both sitting on that very sofa. Mr. Holmes was very nice to them. He soon put them at their ease and promised he would do all he could. Then there is Lord Cantlemere —"

"Ah!"

"Yes, sir, you know what that means. He's a stiff'un, sir, if I may say so. I can get along with the Prime Minister, and I've nothing against the Home Secretary, who seemed a civil, obliging sort of man, but I can't stand his Lordship. Neither can Mr. Holmes, sir. You see, he don't believe in Mr. Holmes and he was against employing him. He'd rather he failed."

"And Mr. Holmes knows it?"

"Mr. Holmes always knows whatever there is to know."

"Well, we'll hope he won't fail and that Lord Cantlemere will be confounded. But I say, Billy, what is that curtain for across the window?"

"Mr. Holmes had it put up there three days ago. We've got something funny behind it."

Billy advanced and drew away the drapery which screened the alcove of the bow window.

Dr. Watson could not restrain a cry of amazement. There was a facsimile of his old friend, dressing-gown and all, the face turned three-quarters towards the window and downward, as though reading an invisible book, while the body was sunk deep in an armchair. Billy detached the head and held it in the air.

"We put it at different angles, so that it may seem more lifelike. I wouldn't dare touch it if the blind were not down. But when it's up you can see this from across the way."

"We used something of the sort once before."

"Before my time," said Billy. He drew the window curtains apart and looked out into the street. "There are folk who watch us from over yonder. I can see a fellow now at the window. Have a look for yourself."