On the low cliffs to the west of Gwithian and adjacent to Strap Rocks, is a mine called Wheal Emily () which re-opened in 1857. In that year 40 tons of good quality copper was produced. The following year 20 tons of Galena was sold at £20 per ton and the mine also produced blende. The mine closed in April 1860 losing over £2000 in its final year. Wheal Liverpool was within a five-minute walk of the coast and Gwithian church, although its exact site is unknown. The mine is mentioned in a letter dated 30 April 1823, requesting Lord de Dunstanville to reduce the dues. Eighteen months later the 40 inch cylinder steam engine and other machinery was advertised for sale. In 1839 the mine was still working, producing 2½ tons of copper.