“You are certainly joking, Holmes.”

“Not in the least. Is it possible that even now, when I give you these results, you are unable to see how they are attained?”

“I have no doubt that I am very stupid, but I must confess that I am unable to follow you. For example, how did you deduce that this man was intellectual?”

For answer Holmes clapped the hat upon his head. It came right over the forehead and settled upon the bridge of his nose. “It is a question of cubic capacity,” said he; “a man with so large a brain must have something in it.”

“The decline of his fortunes, then?”

“This hat is three years old. These flat brims curled at the edge came in then. It is a hat of the very best quality. Look at the band of ribbed silk and the excellent lining. If this man could afford to buy so expensive a hat three years ago, and has had no hat since, then he has assuredly gone down in the world.”

“Well, that is clear enough, certainly. But how about the foresight and the moral retrogression?”

Sherlock Holmes laughed. “Here is the foresight,” said he putting his finger upon the little disc and loop of the hat-securer. “They are never sold upon hats. If this man ordered one, it is a sign of a certain amount of foresight, since he went out of his way to take this precaution against the wind. But since we see that he has broken the elastic and has not troubled to replace it, it is obvious that he has less foresight now than formerly, which is a distinct proof of a weakening nature. On the other hand, he has endeavoured to conceal some of these stains upon the felt by daubing them with ink, which is a sign that he has not entirely lost his self-respect.”

“Your reasoning is certainly plausible.”

“The further points, that he is middle-aged, that his hair is grizzled, that it has been recently cut, and that he uses lime-cream, are all to be gathered from a close examination of the lower part of the lining. The lens discloses a large number of hair ends, clean cut by the scissors of the barber. They all appear to be adhesive, and there is a distinct odour of lime-cream. This dust, you will observe, is not the gritty, gray dust of the street but the fluffy brown dust of the house, showing that it has been hung up indoors most of the time, while the marks of moisture upon the inside are proof positive that the wearer perspired very freely, and could therefore, hardly be in the best of training.”

“But his wife – you said that she had ceased to love him.”

“This hat has not been brushed for weeks. When I see you, my dear Watson, with a week’s accumulation of dust upon your hat, and when your wife allows you to go out in such a state, I shall fear that you also have been unfortunate enough to lose your wife’s affection.”

“But he might be a bachelor.”

“Nay, he was bringing home the goose as a peace-offering to his wife. Remember the card upon the bird’s leg.”

“You have an answer to everything. But how on earth do you deduce that the gas is not laid on in his house?”

“One tallow stain, or even two, might come by chance; but when I see no less than five, I think that there can be little doubt that the individual must be brought into frequent contact with burning tallow – walks upstairs at night probably with his hat in one hand and a guttering candle in the other. Anyhow, he never got tallow-stains from a gasjet. Are you satisfied?”

“Well, it is very ingenious,” said I, laughing; “but since, as you said just now, there has been no crime committed, and no harm done save the loss of a goose, all this seems to be rather a waste of energy.”

Sherlock Holmes had opened his mouth to reply, when the door flew open, and Peterson, the commissionaire, rushed into the apartment with flushed cheeks and the face of a man who is dazed with astonishment.

“The goose, Mr. Holmes! The goose, sir!” he gasped.

“Eh? What of it, then? Has it returned to life and flapped off through the kitchen window?” Holmes twisted himself round upon the sofa to get a fairer view of the man’s excited face.

“See here, sir! See what my wife found in its crop!” He held out his hand and displayed upon the centre of the palm a brilliantly scintillating blue stone, rather smaller than a bean in size, but of such purity and radiance that it twinkled like an electric point in the dark hollow of his hand.

Sherlock Holmes sat up with a whistle. “By Jove, Peterson!” said he, “this is treasure trove indeed. I suppose you know what you have got?”

“A diamond, sir? A precious stone. It cuts into glass as though it were putty.”

“It’s more than a precious stone. It is the precious stone.”

“Not the Countess of Morcar’s blue carbuncle!” I ejaculated.

“Precisely so. I ought to know its size and shape, seeing that I have read the advertisement about it in The Times every day lately. It is absolutely unique, and its value can only be conjectured, but the reward offered of 1000 pounds is certainly not within a twentieth part of the market price.”

“A thousand pounds! Great Lord of mercy!” The commissionaire plumped down into a chair and stared from one to the other of us.

“That is the reward, and I have reason to know that there are sentimental considerations in the background which would induce the Countess to part with half her fortune if she could but recover the gem.”

“It was lost, if I remember right, at the Hotel Cosmopolitan,” I remarked.

“Precisely so, on December 22d, just five days ago. John Horner, a plumber, was accused of having abstracted it from the lady’s jewel-case. The evidence against him was so strong that the case has been referred to the Assizes. I have some account of the matter here, I believe.” He rummaged amid his newspapers, glancing over the dates, until at last he smoothed one out, doubled it over, and read the following paragraph:

“Hotel Cosmopolitan Jewel Robbery. John Horner, 26, plumber, was brought up upon the charge of having upon the 22d inst., abstracted from the jewel-case of the Countess of Morcar the valuable gem known as the blue carbuncle. James Ryder, upper-attendant at the hotel, gave his evidence to the effect that he had shown Horner up to the dressing-room of the Countess of Morcar upon the day of the robbery in order that he might solder the second bar of the grate, which was loose. He had remained with Horner some little time, but had finally been called away. On returning, he found that Horner had disappeared, that the bureau had been forced open, and that the small morocco casket in which, as it afterwards transpired, the Countess was accustomed to keep her jewel, was lying empty upon the dressing-table. Ryder instantly gave the alarm, and Horner was arrested the same evening; but the stone could not be found either upon his person or in his rooms. Catherine Cusack, maid to the Countess, deposed to having heard Ryder’s cry of dismay on discovering the robbery, and to having rushed into the room, where she found matters as described by the last witness. Inspector Bradstreet, B division, gave evidence as to the arrest of Horner, who struggled frantically, and protested his innocence in the strongest terms. Evidence of a previous conviction for robbery having been given against the prisoner, the magistrate refused to deal summarily with the offence, but referred it to the Assizes. Horner, who had shown signs of intense emotion during the proceedings, fainted away at the conclusion and was carried out of court.”

“Hum! So much for the police-court,” said Holmes thoughtfully, tossing aside the paper. “The question for us now to solve is the sequence of events leading from a rifled jewel-case at one end to the crop of a goose in Tottenham Court Road at the other. You see, Watson, our little deductions have suddenly assumed a much more important and less innocent aspect. Here is the stone; the stone came from the goose, and the goose came from Mr. Henry Baker, the gentleman with the bad hat and all the other characteristics with which I have bored you. So now we must set ourselves very seriously to finding this gentleman and ascertaining what part he has played in this little mystery. To do this, we must try the simplest means first, and these lie undoubtedly in an advertisement in all the evening papers. If this fail, I shall have recourse to other methods.”