“A very commonplace little murder,” said he. “You’ve got something better, I fancy. You are the stormy petrel of crime, Watson. What is it?”

I handed him the letter, which he read with the most concentrated attention.

“It does not tell us very much, does it?” he remarked, as he handed it back to me.

“Hardly anything.”

“And yet the writing is of interest.”

“But the writing is not his own.”

“Precisely. It is a woman’s.”

“A man’s surely,” I cried.

“No, a woman’s, and a woman of rare character. You see, at the commencement of an investigation it is something to know that your client is in close contact with some one who, for good or evil, has an exceptional nature. My interest is already awakened in the case. If you are ready we will start at once for Woking, and see this diplomatist who is in such evil case, and the lady to whom he dictates his letters.”

We were fortunate enough to catch an early train at Waterloo, and in a little under an hour we found ourselves among the fir-woods and the heather of Woking. Briarbrae proved to be a large detached house standing in extensive grounds within a few minutes’ walk of the station. On sending in our cards we were shown into an elegantly appointed drawing-room, where we were joined in a few minutes by a rather stout man who received us with much hospitality. His age may have been nearer forty than thirty, but his cheeks were so ruddy and his eyes so merry that he still conveyed the impression of a plump and mischievous boy.

“I am so glad that you have come,” said he, shaking our hands with effusion. “Percy has been inquiring for you all morning. Ah, poor old chap, he clings to any straw! His father and his mother asked me to see you, for the mere mention of the subject is very painful to them.”

“We have had no details yet,” observed Holmes. “I perceive that you are not yourself a member of the family.”

Our acquaintance looked surprised, and then, glancing down, he began to laugh.

“Of course you saw the J H monogram on my locket,” said he. “For a moment I thought you had done something clever. Joseph Harrison is my name, and as Percy is to marry my sister Annie I shall at least be a relation by marriage. You will find my sister in his room, for she has nursed him hand-and-foot this two months back. Perhaps we’d better go in at once, for I know how impatient he is.”

The chamber in which we were shown was on the same floor as the drawing-room. It was furnished partly as a sitting and partly as a bedroom, with flowers arranged daintily in every nook and corner. A young man, very pale and worn, was lying upon a sofa near the open window, through which came the rich scent of the garden and the balmy summer air. A woman was sitting beside him, who rose as we entered.

“Shall I leave, Percy?” she asked.

He clutched her hand to detain her. “How are you, Watson?” said he, cordially. “I should never have known you under that moustache, and I dare say you would not be prepared to swear to me. This I presume is your celebrated friend, Mr. Sherlock Holmes?”

I introduced him in a few words, and we both sat down. The stout young man had left us, but his sister still remained with her hand in that of the invalid. She was a striking-looking woman, a little short and thick for symmetry, but with a beautiful olive complexion, large, dark, Italian eyes, and a wealth of deep black hair. Her rich tints made the white face of her companion the more worn and haggard by the contrast.

“I won’t waste your time,” said he, raising himself upon the sofa. “I’ll plunge into the matter without further preamble. I was a happy and successful man, Mr. Holmes, and on the eve of being married, when a sudden and dreadful misfortune wrecked all my prospects in life.

“I was, as Watson may have told you, in the Foreign Office, and through the influences of my uncle, Lord Holdhurst, I rose rapidly to a responsible position. When my uncle became foreign minister in this administration he gave me several missions of trust, and as I always brought them to a successful conclusion, he came at last to have the utmost confidence in my ability and tact.

“Nearly ten weeks ago—to be more accurate, on the 23d of May—he called me into his private room, and, after complimenting me on the good work which I had done, he informed me that he had a new commission of trust for me to execute.

“‘This,’ said he, taking a gray roll of paper from his bureau, ‘is the original of that secret treaty between England and Italy of which, I regret to say, some rumors have already got into the public press. It is of enormous importance that nothing further should leak out. The French or the Russian embassy would pay an immense sum to learn the contents of these papers. They should not leave my bureau were it not that it is absolutely necessary to have them copied. You have a desk in your office?”

“‘Yes, sir.’

“‘Then take the treaty and lock it up there. I shall give directions that you may remain behind when the others go, so that you may copy it at your leisure without fear of being overlooked. When you have finished, relock both the original and the draft in the desk, and hand them over to me personally to-morrow morning.’

“I took the papers and—”

“Excuse me an instant,” said Holmes. “Were you alone during this conversation?”

“Absolutely.”

“In a large room?”

“Thirty feet each way.”

“In the centre?”

“Yes, about it.”

“And speaking low?”

“My uncle’s voice is always remarkably low. I hardly spoke at all.”

“Thank you,” said Holmes, shutting his eyes; “pray go on.”

“I did exactly what he indicated, and waited until the other clerks had departed. One of them in my room, Charles Gorot, had some arrears of work to make up, so I left him there and went out to dine. When I returned he was gone. I was anxious to hurry my work, for I knew that Joseph—the Mr. Harrison whom you saw just now—was in town, and that he would travel down to Woking by the eleven-o’clock train, and I wanted if possible to catch it.

“When I came to examine the treaty I saw at once that it was of such importance that my uncle had been guilty of no exaggeration in what he had said. Without going into details, I may say that it defined the position of Great Britain towards the Triple Alliance, and fore-shadowed the policy which this country would pursue in the event of the French fleet gaining a complete ascendancy over that of Italy in the Mediterranean. The questions treated in it were purely naval. At the end were the signatures of the high dignitaries who had signed it. I glanced my eyes over it, and then settled down to my task of copying.

“It was a long document, written in the French language, and containing twenty-six separate articles. I copied as quickly as I could, but at nine o’clock I had only done nine articles, and it seemed hopeless for me to attempt to catch my train. I was feeling drowsy and stupid, partly from my dinner and also from the effects of a long day’s work. A cup of coffee would clear my brain. A commissionnaire remains all night in a little lodge at the foot of the stairs, and is in the habit of making coffee at his spirit-lamp for any of the officials who may be working over time. I rang the bell, therefore, to summon him.

“To my surprise, it was a woman who answered the summons, a large, coarse-faced, elderly woman, in an apron. She explained that she was the commissionnaire’s wife, who did the charing, and I gave her the order for the coffee.

“I wrote two more articles and then, feeling more drowsy than ever, I rose and walked up and down the room to stretch my legs. My coffee had not yet come, and I wondered what was the cause of the delay could be. Opening the door, I started down the corridor to find out. There was a straight passage, dimly lighted, which led from the room in which I had been working, and was the only exit from it. It ended in a curving staircase, with the commissionnaire’s lodge in the passage at the bottom. Half way down this staircase is a small landing, with another passage running into it at right angles. This second one leads by means of a second small stair to a side door, used by servants, and also as a short cut by clerks when coming from Charles Street. Here is a rough chart of the place.”