It was said of Miss Letitia that when money came into her possession it went out of circulation.

it's been my experience that the first few days of married life women are blind because they want to be and after that because they have to be.

[When working on a book] I have an almost complete detachment from the world I live in, a sort of armor against distraction. I talk to people, move about, appear on the surface much as usual. But later on I have only a confused memory of what has happened during that period.

Love is like the measles, all the worse when it comes late.

my crime books are actually novels and are written as such. One might even say that each one is really two novels, one of which is the story I tell the reader, and the other the buried story I know and let slip now and then into a clue to whet the reader's interest.

McKnight is gradually taking over the criminal end of the business.

The mystery story is two stories in one: the story of what happened and the story of what appeared to happen.