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Henry Alexander Munro-Butler-Johnstone (7 December 1837 – 17 October 1902) was a British author and Conservative Party politician. Born as Henry Alexander Butler-Johnstone, he was the son of Henry Butler-Johnstone (himself born Hon. Henry Butler), a younger son of the 13th Baron Dunboyne, by his wife Isabella Margaret Munro, daughter of Sir Alexander Munro. His father took the surname Butler-Johnstone to honour an inheritance from his wife's uncle, and he himself took the additional surname Munro from his mother in 1874.