“‘Pon my word, Watson, you are coming along wonderfully. You have really done very well indeed. It is true that you have missed everything of importance, but you have hit upon the method, and you have a quick eye for colour. Never trust to general impressions, my boy, but concentrate yourself upon details. My first glance is always at a woman’s sleeve. In a man it is perhaps better first to take the knee of the trouser. As you observe, this woman had plush upon her sleeves, which is a most useful material for showing traces. The double line a little above the wrist, where the typewritist presses against the table, was beautifully defined. The sewing-machine, of the hand type, leaves a similar mark, but only on the left arm, and on the side of it farthest from the thumb, instead of being right across the broadest part, as this was. I then glanced at her face, and, observing the dint of a pince-nez at either side of her nose, I ventured a remark upon short sight and typewriting, which seemed to surprise her.”

“It surprised me.”

“But, surely, it was obvious. I was then much surprised and interested on glancing down to observe that, though the boots which she was wearing were not unlike each other, they were really odd ones; the one having a slightly decorated toe-cap, and the other a plain one. One was buttoned only in the two lower buttons out of five, and the other at the first, third, and fifth. Now, when you see that a young lady, otherwise neatly dressed, has come away from home with odd boots, half-buttoned, it is no great deduction to say that she came away in a hurry.”

“And what else?” I asked, keenly interested, as I always was, by my friend’s incisive reasoning.

“I noted, in passing, that she had written a note before leaving home but after being fully dressed. You observed that her right glove was torn at the forefinger, but you did not apparently see that both glove and finger were stained with violet ink. She had written in a hurry and dipped her pen too deep. It must have been this morning, or the mark would not remain clear upon the finger. All this is amusing, though rather elementary, but I must go back to business, Watson. Would you mind reading me the advertised description of Mr. Hosmer Angel?”

I held the little printed slip to the light.

“Missing [it said] on the morning of the fourteenth, a gentleman named Hosmer Angel. About five feet seven inches in height; strongly built, sallow complexion, black hair, a little bald in the centre, bushy, black side-whiskers and moustache; tinted glasses, slight infirmity of speech. Was dressed, when last seen, in black frock-coat faced with silk, black waistcoat, gold Albert chain, and gray Harris tweed trousers, with brown gaiters over elastic-sided boots. Known to have been employed in an office in Leadenhall Street. Anybody bringing--”

“That will do,” said Holmes. “As to the letters,” he continued, glancing over them, “they are very commonplace. Absolutely no clue in them to Mr. Angel, save that he quotes Balzac once. There is one remarkable point, however, which will no doubt strike you.”

“They are typewritten,” I remarked.

“Not only that, but the signature is typewritten. Look at the neat little ‘Hosmer Angel’ at the bottom. There is a date, you see, but no superscription except Leadenhall Street, which is rather vague. The point about the signature is very suggestive - in fact, we may call it conclusive.”

“Of what?”

“My dear fellow, is it possible you do not see how strongly it bears upon the case?”

“I cannot say that I do unless it were that he wished to be able to deny his signature if an action for breach of promise were instituted.”