Born in the Isle of St Vincent, British West Indies, about 1868, the eldest child of George Lockett, a Wesleyan minister, and Emily Eaton his wife. He was educated at York Castle School, Jamaica, and came to Great Britain for his medical training. He graduated in medicine at Edinburgh in 1890, and in 1895 took the Membership and Fellowship of the College. Lockett then went back to Jamaica and was appointed senior resident medical officer to the Public Hospital at Kingston; he became consulting surgeon to the hospital in 1915. He had been elected a Fellow of the recently formed American College of Surgeons in 1914. He was an active member of the British Medical Association, served as president of the Jamaica branch in 1932, and represented it at the centenary meeting in London the same year. Lockett married on 22 December 1909 Frances Jordan Dill. There were no children of the marriage. He lived at 5 Lockett Avenue, Kingston, and died there in October 1946.