Cornovii (Cornwall) Dumnoniorum (present day Exeter), it is likely that he only listed Roman places, not purely native sites. Of these, there has been speculation that Voliba might be a place in Cornwall and Tamara is assumed to be on the River Tamar, the border between Cornwall and Devon. Ptolemy's list is supplemented by the problematical Ravenna Cosmography, which lists sixteen names before Isca Dumnoniorum (which is listed as "scadum namorum", showing some of the problems of this source) and which have therefore been assumed to be west of Exeter. Several have been identified as most likely in Devon, leaving "purocoronavis" (the
Southern England as with most geographical regions, people sometimes debate the boundaries. In the west, Southern England is generally taken to include Gloucestershire and Oxfordshire; in central Southern England, the counties of Bedfordshire, Buckinghamshire and Hertfordshire; to the east, Essex and the counties of East Anglia (Cambridgeshire, Norfolk and Suffolk). Despite these definitions, the northern boundary is generally taken to correspond to an imaginary line from the Severn Estuary to the Wash (or expressed in terms of towns, from Gloucester to King's Lynn). Southern England Southern England, or the South of England, also known as the South, refers roughly to the southern