“Sarasate [27] plays at the St. James’s Hall [28] this afternoon,” he remarked. “What do you think, Watson? Could your patients spare you for a few hours?”

“I have nothing to do to-day. My practice is never very absorbing.”

“Then, put on your hat, and come. I am going through the City first, and we can have some lunch on the way. I observe that there is a good deal of German music on the programme, which is rather more to my taste than Italian or French. It is introspective, and I want to introspect. Come along!”

We travelled by the Underground as far as Aldersgate [29] ; and a short walk took us to Saxe-Coburg-square, the scene of the singular story which we had listened to in the morning. It was a poky, little, shabby-genteel place, where four lines of dingy two-storied brick houses looked out into a small railed-in enclosure, where a lawn of weedy grass, and a few clumps of faded laurel bushes made a hard fight against a smoke-laden and uncongenial atmosphere. Three gilt balls and a brown board with “Jabez Wilson” in white letters, upon a corner house, announced the place where our red-headed client carried on his business. Sherlock Holmes stopped in front of it with his head on one side, and looked it all over, with his eyes shining brightly between puckered lids. Then he walked slowly up the street, and then down again to the corner, still looking keenly at the houses. Finally he returned to the pawnbroker’s, and, having thumped vigorously upon the pavement with his stick two or three times, he went up to the door and knocked. It was instantly opened by a bright-looking, clean-shaven young fellow, who asked him to step in.

“Thank you,” said Holmes, “I only wished to ask you how you would go from here to the Strand.”

“Third right, fourth left,” answered the assistant promptly, closing the door.

“Smart fellow, that,” observed Holmes, as we walked away. “He is, in my judgment, the fourth smartest man in London, and for daring I am not sure that he has not a claim to be third. I have known something of him before.”

“Evidently,” said I, “Mr. Wilson’s assistant counts for a good deal in this mystery of the Red-headed League. I am sure that you inquired your way merely in order that you might see him.”

“Not him.”

“What then?”

“The knees of his trousers.”

“And what did you see?”

“What I expected to see.”

“Why did you beat the pavement?”

“My dear Doctor, this is a time for observation, not for talk. We are spies in an enemy’s country. We know something of Saxe-Coburg-square. Let us now explore the parts which lie behind it.”

The road in which we found ourselves as we turned round the corner from the retired Saxe-Coburg-square presented as great a contrast to it as the front of a picture does to the back. It was one of the main arteries which convey the traffic of the City to the north and west. The roadway was blocked with the immense stream of commerce flowing in a double tide inwards and outwards, while the footpaths were black with the hurrying swarm of pedestrians. It was difficult to realize as we looked at the line of fine shops and stately business premises that they really abutted on the other side upon the faded and stagnant square which we had just quitted.

“Let me see,” said Holmes, standing at the corner, and glancing along the line, “I should like just to remember the order of the houses here. It is a hobby of mine to have an exact knowledge of London. There is Mortimer’s, the tobacconist, the little newspaper shop, the Coburg branch of the City and Suburban Bank, the Vegetarian Restaurant, and McFarlane’s carriage-building dep^ot. That carries us right on to the other block. And now, Doctor, we’ve done our work, so it’s time we had some play. A sandwich, and a cup of coffee, and then off to violin-land, where all is sweetness, and delicacy, and harmony, and there are no red-headed clients to vex us with their conundrums.”

My friend was an enthusiastic musician, being himself not only a very capable performer, but a composer of no ordinary merit. All the afternoon he sat in the stalls wrapped in the most perfect happiness, gently waving his long, thin fingers in time to the music, while his gently smiling face and his languid, dreamy eyes were as unlike those of Holmes the sleuth-hound; Holmes the relentless, keen-witted, ready-handed criminal agent, as it was possible to conceive. In his singular character the dual nature alternately asserted itself, and his extreme exactness and astuteness represented, as I have often thought, the reaction against the poetic and contemplative mood which occasionally predominated in him. The swing of his nature took him from extreme languor to devouring energy; and, as I knew well, he was never so truly formidable as when, for days on end, he had been lounging in his armchair amid his improvisations and his black-letter editions. Then it was that the lust of the chase would suddenly come upon him, and that his brilliant reasoning power would rise to the level of intuition, until those who were unacquainted with his methods would look askance at him as on a man whose knowledge was not that of other mortals. When I saw him that afternoon so enwrapped in the music at St. James’s Hall I felt that an evil time might be coming upon those whom he had set himself to hunt down.

“You want to go home, no doubt, Doctor,” he remarked, as we emerged.

“Yes, it would be as well.”

“And I have some business to do which will take some hours. This business at Coburg-square is serious.”

“Why serious?”

“A considerable crime is in contemplation. I have every reason to believe that we shall be in time to stop it. But to-day being Saturday rather complicates matters. I shall want your help to-night.”

“At what time?”

“Ten will be early enough.”

“I shall be at Baker-street at ten.”

“Very well. And, I say, Doctor! there may be some little danger, so kindly put your army revolver in your pocket.” He waved his hand, turned on his heel, and disappeared in an instant among the crowd.

I trust that I am not more dense than my neighbours, but I was always oppressed with a sense of my own stupidity in my dealings with Sherlock Holmes. Here I had heard what he had heard, I had seen what he had seen, and yet from his words it was evident that he saw clearly not only what had happened, but what was about to happen, while to me the whole business was still confused and grotesque. As I drove home to my house in Kensington I thought over it all, from the extraordinary story of the red-headed copier of the “Encyclopaedia” down to the visit to Saxe-Coburg-square, and the ominous words with which he had parted from me. What was this nocturnal expedition, and why should I go armed? Where were we going, and what were we to do? I had the hint from Holmes that this smooth-faced pawnbroker’s assistant was a formidable man – a man who might play a deep game. I tried to puzzle it out, but gave it up in despair, and set the matter aside until night should bring an explanation.