<p>By the middle of the eighteenth century the Wynns of Glynllivon held the dominant interest in Caernarvonshire. At the general election of 1754 Sir John Wynn persisted in his determination to oppose the sitting Member, William Bodvell, despite pressure from the Duke of Newcastle; and to avoid a contest Lord Powis agreed to return Bodvell for Montgomery. When in 1761 Thomas Kyffin of Maenan canvassed Caernarvonshire, Sir John Wynn moved to the borough and left the county to his eldest son, Thomas.