References
(1957), , P.A.S. N/L Nos.14-17., ,
(1960), , The Lyre No.3., pp.13-15 & 67., Orpheus Caving Club
(1977), , P.A.S.Bull. No. 30., p.8.,
(1984), , North Derbyshire Archaeological Survey., ,
(2010), , Caves of the Peak District, p. 174, DCA