کتاب The Adventures of Sherlock Holmes

“You see, but you do not observe. The distinction is clear. For example, you have frequently seen the steps which lead up from the hall to this room.” “Frequently.” “How often?” “Well, some hundreds of times.” “Then how many are there?” “How many? I don’t know.”

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.

“Oscillation upon the pavement always means an affaire de coeur. She would like advice, but is not sure that the matter is not too delicate for communication. And yet even here we may discriminate. When a woman has been seriously wronged by a man she no longer oscillates, and the usual symptom is a broken bell wire. Here we may take it that there is a love matter, but that the maiden is not so much angry as perplexed, or grieved. But here she comes in person to resolve our doubts.”

“You’ve heard about me, Mr. Holmes,” she cried, “else how could you know all that?” “Never mind,” said Holmes, laughing; “it is my business to know things. Perhaps I have trained myself to see what others overlook. If not, why should you come to consult me?”

“Not invisible but unnoticed, Watson. You did not know where to look, and so you missed all that was important. I can never bring you to realise the importance of sleeves, the suggestiveness of thumb-nails, or the great issues that may hang from a boot-lace. Now, what did you gather from that woman’s appearance? Describe it.”