Carmarthenshire
During the seventeenth century both the shire and borough of Carmarthen were dominated by the Vaughans of Golden Grove. In 1713 the male line of the main branch of the family ended with the death of the 3rd Earl of Carbery. His only daughter and heiress married the Marquess of Winchester, who was returned as a Whig in 1715. He vacated his seat on being summoned to the House of Lords in 1717, thus clearing the way for other local families to assert old or new claims to a share in the county representation.