Also called Great Briggan Mine, the sett lies just north of Great North Downs Mine. On the west it is separated from Little North Downs Mine by County Crosscourse and its eastern boundary is the stream that flows north westwards to join the Portreath stream north east of Illogan.
Collins, J.H. (1912); Observations of the West of England Mining Region; 753 pages
Dines, Henry George (1956); BGS - Regional Memoirs - Metalliferous Mining Region of South West England Vol1, The; 567 pages
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
