The more outre' and grotesque an incident is the more carefully it deserves to be examined, and the very point which appears to complicate a case is, when duly considered and scientifically handled, the one which is most likely to elucidate it.

I never can resist a touch of the dramatic.

It is not that I think or believe, but that I know.

When you have one of the first brains of Europe up against you, and all the powers of darkness at his back, there are infinite possibilities.

…but it is better to learn wisdom late than never to learn it at all.

Everything I have to say has already crossed your mind." "Then possibly my answer has crossed yours.

I had ... come to an entirely erroneous conclusion, which shows, my dear Watson, how dangerous it always is to reason from insufficient data.