1869-1900 Locke & Co. 1901-1902 Locke & Co. Ltd 1903 Locke & Co. (Newland) Ltd
Publications (4)
- (1920); BGS - Mineral Resources of GB (c1920s) Vol VII - Lignites, Jet, Kimmeridge oil, England and Wales; 132 pages
- Goodchild, John; NMRS (2000); British Mining 66 - Adventures in Coal; ISBN 0901450 53 7; pp.38,68.
- Hill, Alan; NMRS (2012); British Mining 94 - Coal: A Chronology for Britain; ISBN 0901450 6 85; pp.150,154.
- NMRS; British Mining 96 - Memoirs 2013; pp.7.
Allerton, Haigh Moor - 9m
Whitehills - 392m- Gilberthorpe - 419m
- Fairy Pit - 474m
- Oak Pit - 513m
- Medhurst, Billy Wood Pit - 556m
- Brigshaw Pit - 805m
- Engine Pit - 987m
- Bridley Baulk 2nd Pit - 1,154m
- Low Pit - 1,319m
- Hool Wood - 1,329m
- Allerton (c) - 1,447m
- Allerton - 1,465m
- Mill Pit - 1,589m
- Allerton Main, Albert Pit - 1,609m
- Preston Main - 1,618m
- Lowther's - 1,802m
- Allerton Main, Lowther Pit - 1,825m
- Ledstone Engine - 1,861m
