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.
Charles Manners, 6th Duke of Rutland Charles Cecil John Manners, 6th Duke of Rutland KG (16 May 1815 – 3 March 1888, in Belvoir Castle), styled Marquess of Granby before 1857, was an English Conservative politician.