StatsFull Cave Registry entry
Locked shaft beside steep footpath linking Matlock Bath & Upperwood, on Heights of Jacob. Due to persistent lock-breaking access arrangement is currently suspended (July 2015)
- Ford, T.D. (2001), Mining History. Bull. P.D.M.H.S. Vol.14. No.6., pp.1-34., Peak District Mines Historical Society.
- Maddocks, C. (1957), The Lyre No.2., pp.42-43. Survey., Orpheus Caving Club.
- Webb, D. (2001), A Cave and Mine Conservation Audit for the Masson Hill Area. D.C.A., Derbyshire Caving Association.