Dines, H.G. The Metalliferous Mining Region of South-West England, Vol. I, p.50. vol. II p.610-611.
Dines, H.G. The Metalliferous Mining Region of South-West England addenda and corrigenda, 1988, Vol. II p.xix.
Hamilton Jenkin, A.K. Mines & Miners of Cornwall vol. xii p.14.
List of Mines 1872-1874.
List of Mines 1911-1912.
List of Mines 1911-1913.
List of Mines 1918
Mineral Statistics 1911-1913.
OS 1:10560 map Cornwall 27 NW (1882, 1905).
OS 1:2500 map Cornwall 27-5 (1882, 1905).
C. Reid et al 1910. The Geology of the Country around Padstow and Camelford. Memoirs of the Geological Survey p.100.
Reports of the Inspectors of Mines to Her Majesty’s Secretary of State for the Year 1873, p.297, 306.
Reports of the Inspectors of Mines to Her Majesty’s Secretary of State for the Year 1879, p.421.
Reports of the Inspectors of Mines List of Mines 1873.
Or: Hard Head Mine.
See also: Warleggan Consols Mine.