He has considerable gifts himself. He possesses two out of the three qualities necessary for the ideal detective. He has the power of observation and… - Arthur Conan Doyle

I stooped under the rude lintel, and there he sat upon a stone outside, his gray eyes dancing with amusement as they fell upon my astonished features. He was thin and worn, but clear and alert, his keen face bronzed by the sun and roughened by the wind. In his tweed suit and cloth cap he looked like any other tourist upon the moor, and he had contrived, with that catlike love of personal cleanliness which was one of his characteristics, that his chin should be as smooth and his linen as perfect as if he were in Baker Street.

Let me say right here, Mr. Holmes, that money is nothing to me in this case. You can burn it if it’s any use in lighting you to the truth. This woman is innocent and this woman has to be cleared, and it’s up to you to do it. Name your figure!
My professional charges are upon a fixed scale, I do not vary them, save when I remit them altogether.

"Yes, the reaction is already upon me. I shall be as limp as a rag for a week."
"Strange," said I, "how terms of what in another man I should call laziness alternate with your fits of splendid energy and vigor."