When did the man who Lord Frederick Charles Cavendish was a protege of last serve as Prime Minister?
William Ewart Gladstone William Ewart Gladstone, ( ; 29 December 1809 – 19 May 1898) was a British Liberal statesman and earlier Conservative politician. In a career lasting over 60 years, he served as Prime Minister four separate times (1868–74, 1880–85, February–July 1886 and 1892–94), more than any other person, and served as Chancellor of the Exchequer four times. Gladstone was also Britain's oldest Prime Minister; he resigned for the final time when he was 84 years old.
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.