PDCi

Groaning Tor Level

No known access restrictions, close to public footpath.

Flindall, R., Hayes, A. & Rieuwerts, J. (1977) , Bull. P.D.M.H.S. Vol.6. No.6., pp.275-277. Survey., Peak District Mines Historical Society

Barker, I. & Beck, J.S. (2010) , Caves of the Peak District, p. 152, DCA