In 1768, with Whithorn as the returning burgh, the Earl of Galloway could again decide the MP. For this election the Earl was trying to get a seat in England for his son, Lord Garlies, who was ineligible to represent a Scottish constituency as the eldest son of a Scottish peer. The Earl entered into an agreement with an English MP, George Augustus Selwyn, who controlled both seats in the borough of Ludgershall. Selwyn, who himself represented Gloucester, feared defeat there and wanted a safe alternative seat. In exchange for supporting Lord Garlies in Ludgershall, Selwyn was elected in the Wigtown Burghs. He was the first Englishman to be elected for a Scottish constituency after the Union. However, as Selwyn was also elected in Gloucester and preferred to represent that Borough, a new candidate was required in Scotland. The government was able to offer a Treasury nominee, Chauncy Townsend. After Townsend's death a junior branch of the Stewart family provided the new MP.