"No, no—there are depths, depths! The more I go over it, the more I see in it, and the more I see in it, the more I fear. I don’t know what I don’t see—what I don’t fear!"

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Downstairs in the lounge, by the third pillar from the left, there sits an old lady with a sweet, placid, spinsterish face and a mind that has plumbed the depths of human iniquity and taken it all as in the day's work....where crime is concerned, she's the goods.

— Agatha Christie