Archaeologists Alex Langlands and Peter Ginn go down a copper mine, just a few hundred yards from their cottage, which was once the major source of Morwellham Quay's wealth. In the 19th century the largest deposit of copper in Europe was discovered in Devon. And the mining industry made Morwellham the busiest inland port in Britain. In the latter half of the century rising costs and cheap foreign imports put the copper mining industry into decline. But resourceful Devon farmers found other ways to extract income from copper - such as 'fossicking' (literally scavenging by breaking up rocks overground) and building precipitation tanks which extracted copper deposits from the water which flowed out of the mines.