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.
Henry John Temple, 3rd Viscount Palmerston Henry John Temple, 3rd Viscount Palmerston, (20 October 1784 – 18 October 1865), was a British statesman who served twice as Prime Minister in the mid-19th century. For most of 1830 to 1865 he dominated British foreign policy when Britain was at the height of its power. Popularly nicknamed "Pam" and "The Mongoose", he was in government office almost continuously from 1807 until his death in 1865, beginning his parliamentary career as a Tory, switching to the Whigs in 1830, and concluding it as the first Prime Minister of the newly formed Liberal Party from 1859.