perfect. There are some remains of the ecclesiastic establishments at Bonamargy, where the earls of Antrim are buried, Kells, Glenarm, Glynn, Muckamore and Whiteabbey. The castle at Carrickfergus, dating from the Norman invasion of Ireland, is one of the best preserved medieval structures in Ireland. There are, however, remains of other ancient castles, as Olderfleet, Cam's, Shane's, Glenarm, Garron Tower, Red Bay, and Dunluce Castle, notable for its dramatic location on a rocky outcrop. The principal cairns are: one on Colin mountain, near Lisburn; one on Slieve True, near Carrickfergus; and two on Colinward. The cromlechs most worthy of notice are: one near Cairngrainey, to the north-east of the old road from Belfast to Templepatrick; the large cromlech at Mount Druid, near Ballintoy; and one at the northern extremity of Islandmagee. The mounts, forts and entrenchments are very numerous. The natural rock formations of Giant's Causeway on the Antrim coast are now designated a UNESCO World Heritage Site. Saint Patrick Slemish, about east of Ballymena, is notable as being the scene of St Patrick's early life. According to tradition Saint Patrick was a slave for seven years, near the hill of Slemish, until he escaped back to Great Britain. Linen Linen manufacturing was previously an important industry in the county. At the time Ireland produced a large amount of flax. Cotton-spinning by jennies was first introduced to Belfast by industrialists Robert Joy and Thomas M'Cabe in 1777; and twenty-three years later it was estimated that more than 27,000 people were employed in the industry within of Belfast. Women were employed in the working of patterns on muslin. Notable residents James Adair (1709–1783), explorer, trader, and historian William Aiken (1779–1831), founder of South Carolina Canal and Rail Road Company John Bodkin Adams (1899–1983), general practitioner born in Randalstown and suspected of killing 163 patients while practising in England Joey Dunlop, OBE (1952–2000), from Ballymoney, five-time World Motorcycle Champion William Magee Hunter (1834-1868), New Zealand soldier, born in County Antrim Sir John Jamison (1776–1844), physician and naval surgeon from Carrickfergus who became a constitutional reformer in New South Wales, Australia George Macartney, 1st Earl Macartney (1737–1806), from Ballymoney, first British Ambassador to China Eva McGown (1883–1972), chorister, pioneer, and hostess in Alaska John O'Kane Murray (1847–1885), physician and author James Nesbitt (b.1965), from Broughshane, lived near Coleraine, actor Liam Neeson (b.1952), from Ballymena, actor Geoff Wylie (b.1956), from Ballymena, darts player Tony