Inveraray and Campbeltown were in the interest of the Duke of Argyll, Rothesay in that of the Earl (from 1796 Marquess) of Bute, and Irvine in that of the Earl of Eglintoun. Ayr was more independent than the other burghs, but there Eglintoun and Sir Adam Fergusson of Kilkerran were influential. Argyll and Bute combined throughout the period to return the Member and Eglintoun normally endorsed their choice. It was not until 1820 that the agreement ceased, so that all the elections were uncontested.
Attempts by Whig party leaders from 1806 to persuade the 6th Duke of Argyll to serve them by returning friends without a seat were politely received, but unavailing. In October 1806 William Adam believed that John Campbell II, whose support of ministers was in doubt, would, if again returned, probably attach himself to his friend Lord Eldon. The Earl of Lauderdale had a friend (evidently Henry Erskine) to propose, but the duke maintained that he was already engaged to Campbell and that ‘to attempt now to bring in another person or ... to divide the session, would in the first place probably displease Campbell, and in the next possibly lose me that command of the boroughs which I now possess’.
Ayr (1790, 1812), Irvine (1796, 1818), Ayrshire; Rothesay, Buteshire (1802); Inveraray (1806), Campbeltown (1807), Argyllshire
