1855 Plummer, Taylor & Co. 1860-1890 Hetton Coal Co. 1895-1910 Hetton Coal Co. Ltd 1915-1920 Lam
Publications (2)
- Hill, Alan; NMRS (2012); British Mining 94 - Coal: A Chronology for Britain; ISBN 0901450 6 85; pp.163-164.
- NMRS; Newsletter May/1992; pp.15.