Cavendish, Spencer Compton, ninth Duke of Devonshire, for long known in public life as Marquis of Hartington; also educated at Trinity College, and a leader of the Liberal party; served under Gladstone till he adopted Home Rule for Ireland, but joined Lord Salisbury in the interest of Union, and one of the leaders of what is called the Liberal-Unionist party; (b. 1833).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Cavendish, Henry * Cavendish, Thomas