Mary Susanna Lee (1846-1908) and her sister Catherine Harriet Lee (1847-1914) were English writers of children's fiction. Several of their books had a historical setting; some were targeted at girls. They were usually co-authors and published as M. and C. Lee or Mary and Catherine Lee. Born in London to Henry Boyle Lee MRCS and his wife Anne, they lived in the south of England, and spent their later years in Bishops Stortford with their younger sister Frances.