The dominant interest was in Lord Edgcumbe, and in 1754 and 1761 he returned two Treasury candidates. In June 1764, with Edgcumbe in opposition to the Grenville Administration, Thomas Pitt jun. was approached through his uncle, Charles Lyttelton, bishop of Carlisle, with the suggestion that he should try to re-establish his family interest at Lostwithiel. He replied in a letter of 16 June which the bishop sent on to Grenville:1

It is true that borough has cost us some money and not a little plague; we had, and I believe I still have, in the town and among the seventeen [common councilmen] a natural interest which might easily be revived; but from the constitution of the borough you will see the whole power is thrown into the aldermen.

He saw little chance of destroying Edgcumbe’s hold on Lostwithiel, and for his own part was unwilling to make the attempt. Edgcumbe retained the nomination of both Members throughout the period.