Stanhope was introduced into the secretary of state’s office by Lord Chesterfield, was private secretary to Bedford as secretary of state (1748-51), and in 1755 tried to get Bedford to recommend him to Henry Fox as under-secretary.
In 1774 Stanhope resigned his law clerkship to stand for Winchester on the interest of the Duke of Chandos (formerly Carnarvon), and was given a secret service pension of £100 (held in trust for him by W. Cory). He was returned unopposed, supported North’s Administration till the end, and voted against Shelburne’s peace preliminaries, 18 Feb. 1783. There is no record of his having spoken in the House. He died 19 Sept. 1783.
