Orton, alias Castro, posed as Sir Roger Tichborne from 1865 until his death. For works about the imposture and the ensuing trials see also the heading for Tichborne.
His The trial at bar of Sir Roger C.D. Tichborne, 1875.
Australian Dictionary of Biography, viewed on 1st October 2014 (Arthur Orton, butcher, goldminer, impostor, prisoner, station hand ; birth: 1834, London, England ; death: 1 April 1898, London, England ; alternative names: Thomas Castro, Roger Tichborne) http://adb.anu.edu.au/biography/orton-arthur-4341
Wikipedia, viewed on 1st October 2014 (Arthur Orton (20 March 1834 - 1 April 1898), the son of a London butcher, went to sea as a boy, spent a year in Chile, and worked as a butcher and stockman for squatters in Australia in the middle-to-late 1850s. He has generally been identified by legal historians and commentators as the "Tichborne Claimant", who in two celebrated court cases both fascinated and shocked Victorian society in the 1860s and 1870s. In 1866 Thomas Castro, a butcher from Wagga Wagga in Australia, claimed to be Roger Tichborne ...) http://en.wikipedia.org/wiki/Arthur_Orton