Horace Stansfield Collier

Horace Stansfield Collier (15 July 1864 – 26 February 1930) was a British surgeon at St Mary's Hospital, London, and the Great Ormond Street Hospital for Children (1897–1911). His brother was the physician and neurologist James Stansfield Collier.

Early life Collier was born in Littleborough, Lancashire, on 15 July 1864, the elder son of Alfred Henry Collier and his wife Sarah Collier (née Stansfield). Sarah was a descendant of the Stansfield family of Stansfield, Yorkshire. His younger brother was James Stansfield Collier (1870–1935). He became a Demonstrator in Anatomy (1894–98), Surgical Tutor (1897–1902) then Surgeon and Lecturer on Surgery (1906–11) and later at St Mary’s Hospital, London.