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
Isca Augusta the remains of a Roman harbour had been discovered in Caerleon. Substantial archeologically excavated Roman remains of the Roman fortress can be seen at Caerleon. Cadw administers: The National Roman Legion Museum, located in the village, is part of the National Museums and Galleries of Wales. The museum exhibits artifacts and finds from excavations throughout the village including Roman currency, weapons, uniform etc. In March 2012 an episode of archaeological television programme "Time Team" that had been recorded in Caerleon aired on Channel 4, titled 'Rome's Wild West'. Isca Augusta Isca, variously specified as Isca Augusta or Isca Silurum, was