When did the man who Lord Frederick Charles Cavendish was a protege of last serve as Prime Minister?
Lord Frederick Cavendish Lord Frederick Charles Cavendish {'1': ", '2': ", '3': ", '4': "} (30 November 1836 – 6 May 1882) was an English Liberal politician and "protégé" of the Prime Minister, William Ewart Gladstone. Cavendish was appointed Chief Secretary for Ireland in May 1882 but was murdered only hours after his arrival in Dublin, a victim of the politically motivated Phoenix Park murders.
Lord Augustus FitzRoy Lord Augustus FitzRoy (16 October 171624 May 1741) was a British officer of the Royal Navy. He served during the War of the Austrian Succession, and was involved in the capture of the Spanish ship of the line, "Princesa", a major prize in the war. He was also the father of Augustus Henry Fitzroy, 3rd Duke of Grafton, who became Prime Minister of Great Britain.