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

Man, or at least criminal man, has lost all enterprise and originality. As to my own little practice, it seems to be degenerating into an agency for recovering lost lead pencils and giving advice to young ladies from boarding-schools.

I am the most incurably lazy devil that ever stood in shoe leather.

He burst into one of his rare fits of laughter as he turned away from the picture. I have not heard him laugh often, and it has always boded ill to somebody.

If in 100 years I am only known as the man who invented Sherlock Holmes then I will have considered my life a failure.

I trust that age doth not wither nor custom stale my infinite variety.

There is but one step from the grotesque to the horrible.