No known restriction.
External Links
- https://pdmhs.co.uk/MiningHistory/Bulletin%205-1%20-%20A%20Survey%20of%20Good%20Luck%20Mine%20and%20Adjacent%20Levels%20in%20the%20Via%20Gellia.pdf
- https://peakdistrictcaving.info/home/the-caves/derwent-south/spencers-level
- https://www.28dayslater.co.uk/threads/henstocks-level-spencers-level-and-bonsall-leys-level-via-gellia-middleton-derbyshire-september-2023.136262/
Publications (4)
- Barnatt, John and Huston, Kieron and Mallon, Dave and Newman, Rebekah et al (2013); PDMHS (Peak District Mines Historical Society) 18-6 Win - The Lead Legacy - An Updated Inventory of Important Metal and Gangue Mining Sites in the Peak District, The; 112 pages (1-112)
- Barnatt, John and Worthington, Terry (2006); PDMHS (Peak District Mines Historical Society) 16-3 Sum - Using Coal to Mine Lead - Firesetting at Peak District Mines; 94 pages (1-94)
- Carruthers R.G. & Strahan A. (1922); BGS - Mineral Resources of GB (c1920s) Vol XXVI - Lead & Zinc Ores or Durham, Yorkshire & Derbyshire; 126 pages
- Ford, Trevor D. (2005); PDMHS (Peak District Mines Historical Society) 16-2 Win - Geology of the Wirksworth Mines; 42 pages (1-42)
