Arthur Orton/Thomas Castro was also known as the Tichborne Claimant. English butcher and imposter, born in Wapping High Street, London. He emigrated to Australia in 1852 where he met Sir Alfred Joseph Tichborne, 11th baronet (1839-66).

On the death of the 11th baronet, he persuaded the widow of the 10th baronet (Sir Francis Doughty Tichborne) that he was actually her eldest son, Roger Charles Tichborne (b.1829), who was presumed to have been lost at sea off America in 1854 despite the fact he bore little resemblance to the man.

Invited to England in 1866, he brought an action as the 'Tichborne Claimant' against the 12th baronet, but his action collapsed after 102 days in court. Orton was charged with perjury and found guilty after a lengthy trial of 188 days in 1874, and sentenced to 14 years' hard labour. Released in 1884, he confessed the imposture and died in 1888.
(Bibliography: Chamber's Biographical Dictionary 1968)