Dame Agatha Mary Clarissa Christie, Lady Mallowan, (; née Miller; 15 September 1890 – 12 January 1976) was an English writer. She is known for her 66 detective novels and 14 short story collections, particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple. Christie also wrote the world's longest-running play, a murder mystery, The Mousetrap, and six romances under the name Mary Westmacott. In 1971 she was appointed a Dame Commander of the Order of the British Empire (DBE) for her contribution to literature.
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If I had kept all these things neatly sorted and filed and labelled, it would save me a lot of trouble. However, it is a pleasure sometimes, when looking vaguely through a pile of old note-books to find something scribbled down, as: Possible plot—do it yourself—girl and not really sister—August— with a kind of sketch of a plot. What it's all about I can't remember now; but it often stimulates me, if not to write that identical plot, at least to write something else.