I was sufficiently conversant with Holmes's methods to be able to follow his reasoning, and to see that the nature and state of the various medical instruments in the wicker basket which hung in the lamplight inside the brougham had given him the data for his swift deduction. The light in our window above showed that this late visit was indeed intended for us.

With some curiosity as to what could have sent a brother medico to us at such an hour, I followed Holmes into our sanctum. A pale, taper-faced man with sandy whiskers rose up from a chair by the fire as we entered. His age may not have been more than three or four and thirty, but his haggard expression and unhealthy hue told of a life which has sapped his strength and robbed him of his youth. His manner was nervous and shy, like that of a sensitive gentleman, and the thin white hand which he laid on the mantelpiece as he rose was that of an artist rather than of a surgeon. His dress was quiet and somber—a black frock-coat, dark trousers, and a touch of color about his necktie.

"Good-evening, doctor," said Holmes, cheerily. "I am glad to see that you have only been waiting a very few minutes."

"You spoke to my coachman, then?"

"No, it was the candle on the side-table that told me. Pray resume your seat and let me know how I can serve you."

"My name is Doctor Percy Trevelyan," said our visitor, "and I live at 403 Brook Street."

"Are you not the author of a monograph upon obscure nervous lesions?" I asked. His pale cheeks flushed with pleasure at hearing that his work was known to me.

"I so seldom hear of the work that I thought it was quite dead," said he. "My publishers gave me a most discouraging account of its sale. You are yourself, I presume, a medical man?"

"A retired army surgeon."

"My own hobby has always been nervous disease. I should wish to make it an absolute specialty, but, of course, a man must take what he can get at first. This, however, is beside the question, Mr. Sherlock Holmes, and I quite appreciate how valuable your time is. The fact is that a very singular train of events has occurred recently at my house in Brook Street, and tonight they came to such a head that I felt it was quite impossible for me to wait another hour before asking for your advice and assistance."

Sherlock Holmes sat down and lit his pipe. "You are very welcome to both," said he. "Pray let me have a detailed account of what the circumstances are which have disturbed you."

"One or two of them are so trivial," said Dr. Trevelyan, "that really I am almost ashamed to mention them. But the matter is so inexplicable, and the recent turn which it has taken is so elaborate, that I shall lay it all before you, and you shall judge what is essential and what is not.

"I am compelled, to begin with, to say something of my own college career. I am a London University man, you know, and I am sure that you will not think that I am unduly singing my own praises if I say that my student career was considered by my professors to be a very promising one. After I had graduated I continued to devote myself to research, occupying a minor position in King's College Hospital, and I was fortunate enough to excite considerable interest by my research into the pathology of catalepsy, and finally to win the Bruce Pinkerton prize and medal by the monograph on nervous lesions to which your friend has just alluded. I should not go too far if I were to say that there was a general impression at that time that a distinguished career lay before me.

"But the one great stumbling-block lay in my want of capital. As you will readily understand, a specialist who aims high is compelled to start in one of a dozen streets in the Cavendish Square quarter, all of which entail enormous rents and furnishing expenses. Besides this preliminary outlay, he must be prepared to keep himself for some years, and to hire a presentable carriage and horse. To do this was quite beyond my power, and I could only hope that by economy I might in ten years' time save enough to enable me to put up my plate. Suddenly, however, an unexpected incident opened up quite a new prospect to me.

"This was a visit from a gentleman of the name of Blessington, who was a complete stranger to me. He came up to my room one morning, and plunged into business in an instant.

"'You are the same Percy Trevelyan who has had so distinguished a career and won a great prize lately?' said he.

"I bowed.

"'Answer me frankly,' he continued, 'for you will find it to your interest to do so. You have all the cleverness which makes a successful man. Have you the tact?'

"I could not help smiling at the abruptness of the question.

"'I trust that I have my share,' I said.

"'Any bad habits? Not drawn towards drink, eh?'

"'Really, sir!' I cried.

"'Quite right! That's all right! But I was bound to ask. With all these qualities, why are you not in practice?'

"I shrugged my shoulders.

"'Come, come!' said he, in his bustling way. 'It's the old story. More in your brains than in your pocket, eh? What would you say if I were to start you in Brook Street?'

"I stared at him in astonishment.

"'Oh, it's for my sake, not for yours,' he cried. 'I'll be perfectly frank with you, and if it suits you it will suit me very well. I have a few thousands to invest, d'ye see, and I think I'll sink them in you.'

"'But why?' I gasped.

"'Well, it's just like any other speculation, and safer than most.'

"'What am I to do, then?'

"'I'll tell you. I'll take the house, furnish it, pay the maids, and run the whole place. All you have to do is just to wear out your chair in the consulting-room. I'll let you have pocket-money and everything. Then you hand over to me three quarters of what you earn, and you keep the other quarter for yourself.'

"This was the strange proposal, Mr. Holmes, with which the man Blessington approached me. I won't weary you with the account of how we bargained and negotiated. It ended in my moving into the house next Lady-day, and starting in practice on very much the same conditions as he had suggested. He came himself to live with me in the character of a resident patient. His heart was weak, it appears, and he needed constant medical supervision. He turned the two best rooms of the first floor into a sitting-room and bedroom for himself. He was a man of singular habits, shunning company and very seldom going out. His life was irregular, but in one respect he was regularity itself. Every evening, at the same hour, he walked into the consulting-room, examined the books, put down five and three-pence for every guinea that I had earned, and carried the rest off to the strongbox in his own room.

"I may say with confidence that he never had occasion to regret his speculation. From the first it was a success. A few good cases and the reputation which I had won in the hospital brought me rapidly to the front, and during the last few years I have made him a rich man.

"So much, Mr. Holmes, for my past history and my relations with Mr. Blessington. It only remains for me now to tell you what has occurred to bring me here tonight.

"Some weeks ago Mr. Blessington came down to me in, as it seemed to me, a state of considerable agitation. He spoke of some burglary which, he said, had been committed in the West End, and he appeared, I remember, to be quite unnecessarily excited about it, declaring that a day should not pass before we should add stronger bolts to our windows and doors. For a week he continued to be in a peculiar state of restlessness, peering continually out of the windows, and ceasing to take the short walk which had usually been the prelude to his dinner. From his manner it struck me that he was in mortal dread of something or somebody, but when I questioned him upon the point he became so offensive that I was compelled to drop the subject. Gradually, as time passed, his fears appeared to die away, and he had renewed his former habits, when a fresh event reduced him to the pitiable state of prostration in which he now lies.