It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

To the man who loves art for its own sake, it is frequently in its least important and lowliest manifestations that the keenest pleasure is to be derived.

When you have eliminated the impossible, what is left, no matter how unlikely, is the truth.

Evil indeed is the man who has not one woman to mourn him.

...it was a huge creature, luminous, ghastly, and spectral. I have cross-examined these men, one of them a hard-headed countryman, one a farrier, and one a moorland farmer, who all tell the same story of this dreadful apparition, exactly corresponding to the hell-hound of the legend. I assure you that there is a reign of terror in the district, and that it is a hardy man who will cross the moor at night.

When a doctor does go wrong he is the first of criminals. He has nerve and he has knowledge.

I think there are certain crimes which the law cannot touch, and which therefore, to some extent, justify private revenge.