Through the influence of the second Lord Camelford, the fighting peer, he was returned to parliament in 1801 for the pocket borough of Old Sarum.
In 1768 Lord Holland bought the pocket borough of Midhurst for him, and he entered on his parliamentary career, and on London society, in 1769.
In the 18th century the corporation, a close body, declined, its duties being performed by the vestry, and in 1789 the one survivor resigned and handed over the town papers to the bishop. Farnham sent representatives to parliament in 1311 and 1460, on both occasions being practically the bishop's pocket borough.
In the opinion of the people he was now regarded as the embodiment of all legal virtue; his health was toasted at the dinners of the Whigs amid rounds of applause, and, in recompense for the loss of his seat in parliament, he was returned by Lord Clive for his pocket-borough of Bishop's Castle, in Shropshire, in January 1770.
Pitt continued at his post; and at the general election which took place during the year he even accepted a nomination for the duke's pocket borough of Aldborough.