The fortunes of the harbour became much reduced, with trade going to Plymouth and elsewhere instead. Fishing became more important, but local merchants were often appointed as privateers and did some smuggling on the side. Tin, copper and iron mines, along with quarries and china clay pits became important industries in the area, which led to improvements at rival harbours. West Polmear beach was dug out to become Charlestown harbour circa 1800, as was Pentewan in 1826. Joseph Austen shipped copper from Caffa Mill Pill above Fowey for a while before starting work on the new Par harbour in 1829. Fowey had to wait another forty years before it saw equivalent development, but its natural deep-water anchorage and a rail link soon gave it an advantage over the shallow artificial harbours nearer to the mines and china clay works. Meanwhile, a beacon tower was erected on the Gribben Head by Trinity House to improve navigation into Fowey and around Par bay.