 During the mining boom in Victorian times more than 7000 people were employed in the mines of the Tamar Valley.During this period Gunnislake was held in equal standing amongst the richest mining areas in Europe.There has recently been discovered a significant Roman fort on the outskirts of Calstock, the largest known Roman site in Cornwall and the famous painting by Turner 'Crossing the Brook' exhibited in 1815 is in fact a view of Newbridge.