Mining reached its technical apogee in Gwennap in the 1840s with the installation of the first ever man engine in Britain at Tresavean Mine; but the nature of the area's geology, which had bestowed such wealth, eventually proved its downfall. thumb|Frogpool Methodist Church In the nearby Camborne-Redruth district, rich deposits of tin were found below the copper. In Gwennap no such deposits were found and when low prices caused the collapse of the copper market in the 1860s, many mines were forced to close or amalgamate. Consolidated and United were incorporated into Clifford Amalgamated mine. Many of the mines that continued or went over to tin production could not survive the rising cost of coal and the fluctuations of mineral prices, causing a second wave of closures in the mid-1870s.
