Sir Arthur Conan Doyle

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

There is nothing as deceptive as an obvious fact.

Crime is common. Logic is rare. Therefore it is upon the logic rather than upon the crime you should dwell.

Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

Sir Walter, with his 61 years of life, although he never wrote a novel until he was over 40, had, fortunately for the world, a longer working career than most of his brethren.

When you have eliminated the impossible, that which remains, however improbable, must be the truth.

Life is infinitely stranger than anything which the mind of man could invent. We would not dare to conceive the things which are really merely commonplaces of existence.

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

It is stupidity rather than courage to refuse to recognize danger when it is close upon you.

There comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.