Arthur Featherstone Marshall (1818 – 14 December 1877) was an English Anglican priest who converted to Roman Catholicism in the 1860s. Educated at Trinity College, Cambridge, Marshall became Vicar of Swallowcliffe, in Wiltshire. In 1845, he was received into the Roman Catholic Church in Lord Arundell's chapel at Wardour Castle. He subsequently published satirical (mostly pseudonymous) material on the Anglican principle of comprehensiveness and a trenchant criticism of opponents of the First Vatican Council, especially Old Catholics. Specific Anglican tenets he singles out for attack include the Branch theory and the sacramental validity of Anglican ministry and holy orders.