Before the Act of Union 1707, the barons of the sheriffdom or shire of Berwick (also called the Merse) elected commissioners to represent them in the unicameral Parliament of Scotland and in the Convention of Estates. The number of commissioners was increased from two to four in 1690.
During the Commonwealth of England, Scotland and Ireland the sheriffdom was represented by one Member of Parliament in the Protectorate Parliament at Westminster. After 1708, Berwickshire returned one member to the House of Commons of Great Britain and later to the House of Commons of the United Kingdom.
List of shire commissioners
1612: William Cockburn of LangtonG. E. C., The Complete Baronetage, vol. II (1902) p. 327. 1612, 1621: Robert Swinton of that IlkJoseph Foster, Members of Parliament, Scotland (1882) p. 340. 1625: James Cockburn of RyslawComplete Baronetage, vol. II, pp. 330–331. 1630: Sir Patrick Hume of PolwarthComplete Baronetage, vol. II, p. 304. 1639, 1640–41, 1645–46, 1649–50: Sir David Home of WedderburnComplete Baronetage, vol. II, p. 442. 1640–41: Sir William Cockburn of LangtonComplete Baronetage, vol. II, p. 328. 1644–45: Sir Alexander Swinton of that IlkFoster, p. 339. 1649, 1650, 1654–55, 1656–58, 1659–60: John Swinton of that Ilk 1661–63: Colonel John Hume of Plandergaist 1661–63: Sir Robert Douglas of Blaikerstone 1665 convention, 1667 convention, 1669–74: Sir Robert Sinclair of LongformacusComplete Baronetage, vol. III (1903) p. 351. 1665 convention, 1667 convention, 1669–74, 1689 convention, 1689–90: Sir Patrick Hume of Polwarth (ennobled 1690) 1678 convention: Sir Roger Hog of HarcarseFoster, p. 180. 1678 (convention), 1685–86, 1689 (convention), 1689–1702: Sir Archibald Cockburn of Langton 1681–82: John Edgar of Wedderlie 1690–1706: Sir John Home of BlackadderComplete Baronetage, vol. IV, p. 281.Complete Baronetage, vol. IV (1904) p. 280. 1690–1702, 1702–07: Sir John Swinton of that Ilk 1702–07: Sir Robert Sinclair of LongformacusComplete Baronetage, vol. III, pp. 351–352. 1702-07: Sir Patrick Home of Rentoun 1706–07: Sir Alexander Campbell of Cesnock
References
See also List of constituencies in the Parliament of Scotland at the time of the Union