Born on 18 May 1877 younger son of Alexander Moseley MRCS (1858), surgeon dentist of Craven Hill Gardens; Alexander and his eldest brother Benjamin changed their name to Morley in 1869; they were sons of Ephraim Moseley a surgeon-dentist of Grosvenor Street, were both St George's men, Members of the College, and dental surgeons. Alexander's elder son Frank Morley (1870-1942) MRCS LDS became dental surgeon to St George's. Arthur Morley was educated at University College School and St George's, where he was house physician and house surgeon in 1901. He was assistant medical officer to the South Western Fever Hospital and temporary surgeon to St Mark's Hospital for Diseases of the Rectum. During the first world war he saw active service as a Captain RAMC. He was afterwards anaesthetist to the King George V Hospital, the Hospital for Sick Children, Great Ormond Street, and the Samaritan Hospital, and was later principal medical referee to various assurance companies. He was a member of the Medico-Legal Society. Morley lived successively at Gordon Square, Upper Wimpole Street, and Devonshire Street, and after retirement at 24 Harley House where he died after long illness on 7 February 1962 aged 84.