No man lives or has ever lived who has brought the same amount of study and of natural talent to the detection of crime which I have done.

...Holmes, who loathed every form of society with his whole Bohemian soul, remained in our lodgings in Baker Street, buried among his old books, and alternating from week to week between cocaine and ambition, the drowsiness of the drug, and the fierce energy of his own keen nature.

He foresaw that she would be very much more useful to him in the character of a free woman.

Accounts are not quite settled between us," said she, with a passion that equaled my own. "I can love, and I can hate. You had your choice. You chose to spurn the first; now you must test the other.

It is a mistake to confound strangeness with mystery. The most commonplace crime is often the most mysterious because it presents no new or special features from which deductions may be drawn. This murder would have been infinitely more difficult to unravel had the body of the victim been simply found lying in the roadway without any of those outré and sensational accompaniments which have rendered it remarkable. These strange details, far from making the case more difficult, have really had the effect of making it less so.

It is, I admit, mere imagination; but how often is imagination the mother of truth?

I am a brain, Watson. The rest of me is a mere appendix.