The Sign of the Four

by Arthur Conan Doyle

"My mind," he said, "rebels at stagnation. Give me problems, give me work, give me the most abstruse cryptogram, or the most intricate analysis, and I am in my own proper atmosphere. I can dispense then with artificial stimulants. But I abhor the dull routine of existence. I crave for mental exaltation. That is why I have chosen my own particular profession, or rather created it, for I am the only one in the world."

Eliminate all other factors, and the one which remains must be the truth."

Would you think me impertinent if I were to put your theories to a more severe test?" "On the contrary," he answered, "it would prevent me from taking a second dose of cocaine.

she must be seven-and-twenty now — a sweet age, when youth has lost its self-consciousness and become a little sobered by experience.

Sherlock Holmes leaned back in his chair with an abstracted expression and the lids drawn low over his glittering eyes. As I glanced at him I could not but think how on that very day he had complained bitterly of the commonplaceness of life. Here at least was a problem which would tax his sagacity to the utmost.

"This is all an insoluble mystery to me," said I. "It grows darker instead of clearer." "On the contrary," he answered, "it clears every instant. I only require a few missing links to have an entirely connected case."

So swift, silent, and furtive were his movements, like those of a trained bloodhound picking out a scent, that I could not but think what a terrible criminal he would have made had he turned his energy and sagacity against the law instead of exerting them in its defence.

He was likely, I thought, to fall into error through the over-refinement of his logic — his preference for a subtle and bizarre explanation when a plainer and more commonplace one lay ready to his hand.

"Winwood Reade is good upon the subject," said Holmes. "He remarks that, while the individual man is an insoluble puzzle, in the aggregate he becomes a mathematical certainty. You can, for example, never foretell what any one man will do, but you can say with precision what an average number will be up to. Individuals vary, but percentages remain constant. So says the statistician.