1766-1781 Thomas Cornforth & Co. 1783-1806 Chaytor & Colling
Publications (6)
- Gill, M.C. & Burt, R.; NMRS (2003); British Mining 72 - Mines of Yorkshire, The; ISBN 0901450 56 1; pp.291,321,384-385.
- NMRS (1971); Memoirs Vol2, No.1; p.8.
- NMRS (1973); Memoirs Vol2, No.3; p.159.
- NMRS; British Mining 90 - Memoirs 2010 - 50 Years of Mining History; pp.173,185,186,189.
- NMRS; Newsletter May/1998; p.3.
- 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

