31
References: (1) Mendip Caves, Book 3. H.E. Balch, 1948. Page 91. (2) Mendip Bibliography, Mansfield, Standing and Reynolds. C.R.G. Publication No.13. (Jul. 1965) (3) Belfry Bulletin Vol 23 No1 (January 1969) (4) Traverse Closure in Cave Surveying. Irwin and Stenner. Belfry Bulletin Vol 27 No 1 F ig 5(b). (5) Cave Surveying. Butcher and Railtoin. C.R.G. Trans. Vol 8. No2.