What an absurdity to go and bury oneself in South America, where they are always having revolutions.

What I feel is that if one has got to have a murder actually happening in one's house, one might as well enjoy it, if you know what I mean.

Many homicidal lunatics are very quiet, unassuming people. Delightful fellows.

I am not one to rely upon the expert procedure. It is the psychology I seek, not the fingerprint or the cigarette ash.

Many years ago, when I was once saying sadly to Max it was a pity I couldn't have taken up archaeology when I was a girl, so as to be more knowledgeable on the subject, he said, 'Don't you realize that at this moment you know more about prehistoric pottery than any woman in England?'

When the fact doesn't meet the theory then let go the theory.

I have always been so sure - too sure... But now I am very humble and I say like a little child: "I do not know..."