My mind rebels at stagnation, give me problems, give me work!

horses: dangerous on both ends and crafty in the middle

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.

I am somewhat exhausted; I wonder how a battery feels when it pours electricity into a non-conductor?

On general principles, it is best that I should not leave the country. Scotland Yard feels lonely without me, and it causes an unhealthy excitement among the criminal classes.

If the man who observes the myriad stars, and considers that they and their innumerable satellites move in their serene dignity through the heavens, each swinging clear of the other's orbit-if, I say, the man who sees this cannot realise the Creator's attributes without the help of the book of Job, then his view of things is beyond my understanding.

To all the world he was the man of violence, half animal and half demon; but to her he always remained the little wilful boy of her own girlhood, the child who had clung to her hand. Evil indeed is the man who has not one woman to mourn him.