Henry Harcourt Hyde Clarke (14 December 1815 – 1 March 1895) was an English engineer, philologist and author.
The son of Henry and Susannah Clarke, he was born at Little Bell Alley, Barbican in London.
He edited the Railway Register from 1845 to 1847 and founded the London and County Bank.
He was expelled from the Anthropological Society of London on 22 August 1868[1] in the wake of public allegations he had made concerning (chiefly) the mismanagement of accounts of that body.
He corresponded with Charles Darwin[2] He married Maria Mildred Eaton, with one son one daughter: Maria died at their home, 32 St George's Square, Mayfair, London, in 1892 aged 71.