'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.

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.

The whole force of the State is at your back if you should need it. I'm afraid that all the queen's horses and all the queen's men cannot avail in this matter.

Jealousy is a strange transformer of characters.

There are always some lunatics about. It would be a dull world without them.

It is a fool's plan to teach a man to be a cur in peace, and think that he will be a lion in war.

Amberley excelled at chess - a mark, Watson, of a scheming mind.