Born 12 June 1860 at Valence, France, the second son and second child of William Rew Pratt, FRCS, and Maria Louisa Harvey, his wife. Mrs Pratt claimed descent from the family of which William Harvey was an illustrious member. Pratt was educated privately at Newtown, Montgomeryshire, and at Westminster Hospital. He then entered Netley where he gained the Herbert prize and Montefiore medal and the Army Medical scholarship 1883-84. He was gazetted surgeon I.M.S. on 29 September 1883, chose the Bengal side and in 1884 took part in the Zhob Valley expedition, North-West Provinces. He was promoted surgeon-major, 21 September 1895, lieutenant-colonel, 29 September 1903, was placed on the selected list for promotion on 22 June 1909, and retired with an extra pension on 27 December 1912. He was civil surgeon in the United Provinces 1889-1910. He rejoined for war service 2 December 1914, was appointed officer in charge of the Hospital for Indian Wounded at Brighton, and was promoted brevet-colonel on 1 January 1918. He was a member of the board for wounded officers at Caxton Hall, Westminster, and served as its president during the years 1917-18-19. He was also inspector of surgical instruments at the India Office. In 1912 he became a student at the London School of Tropical Medicine, and was surgeon to the Hospital for Tropical Diseases at the Royal Albert Dock from 1914 until 1925. He lectured on surgery in the tropics at the School of Tropical Medicine from 1914 and was lecturer on tropical diseases at the Westminster Hospital from 1913. He married Ethel Mayne Fendall Currie on 4 January 1892, and died in London on 12 August 1937, survived by her, a son and a daughter. His son presented a statuette of Harvey to the College in his memory.