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.
William Cavendish, 1st Duke of Devonshire William Cavendish, 1st Duke of Devonshire (25 January 1640 – 18 August 1707) was an English soldier, nobleman, and Whig politician who sat in the House of Commons from 1661 to 1684 when he inherited his father's peerage as Earl of Devonshire. He was part of the "Immortal Seven" group that invited William III, Prince of Orange to depose James II of England as monarch during the Glorious Revolution, and was rewarded with the elevation to Duke of Devonshire in 1694.