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.
F. J. Robinson, 1st Viscount Goderich Frederick John Robinson, 1st Earl of Ripon, (1 November 1782 – 28 January 1859), styled The Honourable F. J. Robinson until 1827 and known as The Viscount Goderich between 1827 and 1833, the name by which he is best known to history, was a British statesman. He was Prime Minister of the United Kingdom between August 1827 and January 1828.