A survey in two volumes by Melvyn Davies of the Worms Head & Mainland Caves, 1-47 undertaken between July and September 1989; a survey of the Gower Coast Caves by R. T. Sutton, Melvyn Davies and Dr Graham Jenkins, September 1990; together with surveys of the caves of the South Gower Coast, Worms Head to Porteynon Point by Melvyn Davies, January 1987, and another copy with a few additions by Andrew Davies, and from Porteynon Point to Pwlldu Bay by Melvyn Davies, May and August 1990.