A map of southwestern Britain in AD 800, showing the area around Somerset, Dorset, Dyvnaint (Devon), and Cornweals (Cornwall). The map shows the religious houses of Bradford, Frome, Glastonbury, Sherborne, and Wareham, and the towns of Exeter, Taunton, Dorchester, Badbury, Charford, and Devizes. The rivers Tamar, Taw, Exe, Tone, Parret, Stour, Avon, and Lower Avon are also shown.