Since William Camden, Burgh Castle has been suggested as the site of Cnobheresburg, the unknown place (a "castrum" or fort) in East Anglia, where in about 630 the first Irish monastery in southern England was founded by Saint Fursey as part of the Hiberno-Scottish mission described by Bede. Historians find many arguments against this location, but are unable to agree on a better one. The Roman fort at Burgh Castle was excavated by Charles Green during 1958–61. A detailed report by Norfolk Museums Service in 1983 ("East Anglian Archaeology 20") found no evidence of any monastic settlement in Burgh Castle itself.