A team of archaeologists from the University of Exeter has found a Roman fort dating from the 1st Century AD in fields in Cornwall. Several items of pottery have been excavated and a furnace which may have been used to smelt minerals. Researchers said the find at Calstock, close to a silver mine, could show for the first time the Romans' interest in exploiting Cornish minerals. Very little is known so far about the Roman occupation in Cornwall... Archaeologists became interested in the site when they found references in medieval documents to the smelting of silver "at the old castle"...