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.
Sir George Grey, 2nd Baronet Sir George Grey, 2nd Baronet, PC (11 May 1799 – 9 September 1882) was a British Whig politician. He held office under four Prime Ministers, Lord Melbourne, Lord John Russell, Lord Aberdeen, and Lord Palmerston, and notably served three times as Home Secretary.