1872-1891 London Lead Company 1892-1914 Wm Lee & Son 1915-1927 W. & W. Lee 1935-1938 F.J. Smith 1940-1944 F.J. Ryland 1945-1948 Flushiemere Barytes Mines Ltd
Carruthers R.G. & Strahan A. (1922); BGS - Mineral Resources of GB (c1920s) Vol XXVI - Lead & Zinc Ores or Durham, Yorkshire & Derbyshire; 126 pages
Fairbairn, Raymond A.; NMRS (2005); British Mining 77 - Mines of Upper Teesdale, The; ISBN 0901450 59 6; pp.13,25,33-34,77,118-119,121,123-125
NMRS; Newsletter Feb/1993; pp.2
Wilson G.V., Eastwood T., Pocock R.W., Wray D.A. & Robertson T. (1922); BGS - Mineral Resources of GB (c1920s) Vol II - Barytes and Witherite; 136 pages