I trust that age doth not wither nor custom stale my infinite variety.

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.

'It is my duty to warn you that it will be used against you,' cried the Inspector, with the magnificent fair play of the British criminal law.

Well, well, my dear fellow, be it so. We have shared this same room for some years, and it would be amusing if we ended by sharing the same cell. (...)

I am not the law, but I represent justice so far as my feeble powers go.

His love of danger, his intense appreciation of the drama of an adventure--all the more intense for being held tightly in--his consistent view that every peril in life is a form of sport, a fierce game betwixt you and Fate, with Death as a forfeit, made him a wonderful companion at such hours.

Do you know anything on earth which has not a dangerous side if it is mishandled and exaggerated?