Large opencast and underground. Operational from 1855 to 1880, this mine yielded a combined output of 2,992 tons of tin, 322 tons of copper, alongside minor quantities of tungsten and arsenic. Located in the valley near Trelissick and Carnmeal Downs, it extensively worked lodes in the area, particularly focusing on a series of lodes referred to as Conquer Branches, which were subject to large-scale opencast operations.
Dines, Henry George (1956); BGS - Regional Memoirs - Metalliferous Mining Region of South West England Vol1, The; 567 pages
NMRS; British Mining 43 - Memoirs 1991; pp.12-14,16-20,25,30-31.
NMRS; British Mining 48 - Memoirs 1993; pp.86.
Various (1920); BGS - Mineral Resources of GB (c1920s) Vols XIV, XV, XVI, XVII, XVIII - Fireclay; Arsenic & Antimony Ores; Refactory Materials, Lead & Zinc of Scotland, Rock-Salt and Brine (5 books); 777 pages
