You have a grand gift for silence, Watson. It makes you quite invaluable as a companion.

They say that genius is an infinite capacity for taking pains," he remarked with a smile. "It's a very bad definition, but it does apply to detective work.

The world is full of obvious things which nobody by any chance ever observes.

You will, I am sure, agree with me that... if page 534 only finds us in the second chapter, the length of the first one must have been really intolerable.

I rose to go, but Holmes caught me by my wrist and pushed me back into my chair. 'It is both, or none,' said he. 'You may say before this gentleman anything which you may say to me.

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

It has long been an axiom of mine that the little things are infinitely the most important.