I consider that a man’s brain originally is like a little empty attic, and you have to stock it with such furniture as you choose.

Mediocrity knows nothing higher than itself.

THE LOWEST AND VILEST ALLEYS IN LONDON DO NOT PRESENT A MORE DREADFUL RECORD OF SIN THAN DOES THE SMILING AND BEAUTIFUL COUNTRYSIDE.

Mediocrity knows nothing higher than itself, but talent instantly recognizes genius.

Where there is no imagination there is no horror.

It is a capital mistake to theorize before you have all the evidence. It biases the judgement.

It is the unofficial force—the Baker Street irregulars.

London, that great cesspool into which all the loungers and idlers of the Empire are irresistibly drained.

When you have eliminated the impossible, whatever remains, however improbable, must be the truth?

You know my methods. Apply them.