There is no detective in England equal to a spinster lady of uncertain age with plenty of time on her hands.

With thought, all problems can be resolved.

I am not mad. I am eccentric perhaps--at least certain people say so; but as regards my profession. I am very much as one says, 'all there.

Trains are wonderful.... To travel by train is to see nature and human beings, towns and churches and rivers, in fact, to see life.

The supernatural is only the natural of which the laws are not yet understood.

Doctors can do almost anything nowadays, can't they, unless they kill you while they're trying to cure you.

I'm sorry, but I do hate this differentiation between the sexes. The modern girl has a thoroughly businesslike attitude to life! That sort of thing. It's not a bit true! Some girls are businesslike and some aren't. Some men are sentimental and muddle-headed, others are clear-headed and logical. There are just different types of brains.