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In page Mary Cadogan:

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Mary Cadogan's writing career started late but her first book You're a Brick, Angela! was an immediate success. Her articles on the history of children's fiction have appeared in a number of magazines. She wrote a notable biography of Richmal Crompton, who wrote the Just William books. She first met her in the late 1940s, but reported that she was then too shy to ask any questions about her writings.[citation needed]