Dines, H.G. The Metalliferous Mining Region of South-West England, Vol. I, p.43, 467, 470-471.
Dines, H.G. The Metalliferous Mining Region of South-West England addenda and corrigenda, 1988, Vol. I p.xlvi.
Hamilton Jenkin, A.K. Mines & Miners of Cornwall vol. ii p.28, 33.
List of Mines 1859-1861.
List of Mines 1863-1874.
List of Mines 1888-1895.
Metalliferous mines (Devon and Cornwall). Return showing the names of the various metalliferous mines within the stannaries of Devon and Cornwall now working. Parliamentary Papers 1890-1891. p.2.
Mineral Statistics 1852, 1855-1857.
Mineral Statistics (Devon) 1872.
Mineral Statistics 1890-1893.
MJ 1845 p.314
MJ 1847 p.257, 269
MJ 1851 p.3, 22
MJ 1877 p.130
MJ 1880 p.88
MJ 1881 p.104, 136
MJ 1895 p.76
MJ 1914 p.493
MJ 1927 p.268, 575, 667
MJ shares listed 1850-1853.
MJ shares listed 1895
Mining Review 1838 vol. iv p.60
Register of Defunct Companies 1990 p.536.
Reports of the Inspectors of Mines List of Mines 1873-1876.
Or: Friendly Mines. Wheal Friendly Co. Wheal Friendly Mine Co.
See also: Wheal Kitty. South Polberro Mine. West Kitty Mine.