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Henry Thomas "Harry" Blackstaffe (28 July 1868 – 22 August 1951) was a British rower who competed in the 1908 Summer Olympics. Blackstaffe was born in Islington, London, and became a butcher. He was a long-standing member of Vesta Rowing Club in Putney and also a cross-country runner who represented in the National Championships. As a single sculler he won nine victories in the London Cup at the Metropolitan Regatta. He first won the Wingfield Sculls in 1897 but in 1898, 1899 and 1900 was beaten by Benjamin Hunting Howell. He won again in 1901 defeating Saint-George Ashe and Arthur Cloutte. He lost to Cloutte in 1902 and to Ashe in 1904, but beat them both in 1905 and 1906. At first he had difficulty in having his entry accepted for Henley Royal Regatta but competed in the Diamond Challen