Any truth is better than indefinite doubt.

— Arthur Conan Doyle

Art in the blood is liable to take the strongest forms

— Arthur Conan Doyle

A sandwich and a cup of coffee, and then off to violin-land, where all is sweetness and delicacy and harmony.

— Arthur Conan Doyle

As a rule, the more bizarre a thing is the less mysterious it proves to be. It is your commonplace, featureless crimes which are really puzzling, just as a commonplace face is the most difficult to identify.

— Arthur Conan Doyle

A study in scarlet, eh? Why shouldn't we use a little art jargon? There's the scarlet thread of murder running through the colorless skein of life, and our duty is to unravel it, and isolate it, and expose every inch of it.

— Arthur Conan Doyle

Before we begin to investigate that, let us try to realize what we do know, to make the most of it, and to separate the essential from the accidental.

— Arthur Conan Doyle

Beyond the obvious facts that he has at some time done manual labor, that he takes snuff, that he is a Freemason, that he has been in China, and that he has done a considerable amount of writing lately, I can deduce nothing else.

— Arthur Conan Doyle

By the way, Doctor, I shall want your cooperation.'' I shall be delighted.'' You don't mind breaking the law?'' Not in the least.'' Nor running a chance of arrest?'' Not in a good cause.'' Oh, the cause is excellent!'' Then I am your man.'' I was sure that I might rely on you.

— Arthur Conan Doyle

Dark nights are unpleasant," "Yes, for strangers to travel,""The clouds are heavy."" Yes, a storm is approaching.

— Arthur Conan Doyle

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.

— Arthur Conan Doyle