Call on Mr & Mrs Ritter at Perryfoot Farm. Small charge of £1 payable. Park & change in layby on main road.
(1969), , D.C.C. Bulletin, , Derbyshire Caving Club
(1975), , Caves of Northern Derbyshire. Part 4., p.9.,
(1998), , Descent No.145, p.11., Wild Places Publishing
(2010), , Caves of the Peak District, p. 110, DCA