SCILLY, ISLES OF

also called Scilly Isles group of about 50 small islands and many more islets lying southwest of Cornwall, England, 2536 miles (4058 km) off Land's End. Administratively, the islands are a distinct unit within England, though they form a part of the historic county of Cornwall. Because their council serves the functions of both a district and a county, they have a status similar to that of a unitary authority. Totaling about 6 square miles (16 square km) in extent, the islands are composed of granite and are a continuation of the granite masses of the Cornish mainland. The islands reach an elevation of 165 feet (50 metres) in St. Mary's, the largest island, and have rocky, dangerous coasts with many reefs. Because the islands' climate is exceptionally mildthe mean monthly temperatures range from 45 to 62 F (7 to 16 C)their fauna and flora are quite different from those on the English mainland. Many subtropical plants flourish. Among an immense variety of seabirds that visit the islands, the roseate tern is the rarest British breeding tern, and the Manx shearwater has its only British breeding site in the islands. Seals live on the rocks and islets. There are prehistoric remains in the form of barrows and rude pillars on the islands. Henry I (reigned 110035) gave the islands to the abbot of Tavistock in Devon. In the 16th century they became crown property and were leased in 1571 to Francis Godolphin, who built Star Castle above Hugh Town in 1593. During the English Civil Wars Prince Charles sheltered there until his escape to Jersey in 1646. Early a haunt of pirates, the islands were later notorious for smuggling activities carried on there. In 1834 Augustus Smith succeeded the Godolphins as the islands' lessee, and in 1933 the main islands were handed over to the British crown. Only five of the islandsSt. Mary's, Tresco, St. Martin's, Bryher, and St. Agnesare inhabited. Most of the people live on St. Mary's, which has a harbour at Hugh Town and a museum of Scilly history and prehistory. The major industries are tourism and commercial flower growing and vegetable growing, the latter made possible by the prevailing mild climate. Fishing is also significant. There are sea and helicopter services to Penzance, on the mainland. Pop. (1991 prelim.) 2,900.