The lowest and vilest alleys of London do not present a more dreadful record of sin than does the smiling and beautiful countryside.

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.

I never guess. It is a shocking habit destructive to the logical faculty.

The good Watson had at that time deserted me for a wife, the only selfish action I can recall in our association. I was alone.

...while the individual man is an insoluble puzzle, in the aggregate he becomes a mathematical certainty.

Violence does, in truth, recoil upon the violent, and the schemer falls into the pit which he digs for another.

The Times is a paper which is seldom found in any hands but those of the highly educated.