Oliver C. Lloyd, SB, 20pp, University of Bristol Spelaeological Society (1979)

A description and surveys of the four Hepste River Caves: Ogof Afon Hepste, Ogof Tarddiant Hepste, Ogof Tram Truck and the Hepste Resurgence itself.
The uplands of Hepste contain a number of caves with perculiar features and five of these are illustrated.
Three of the Upper Hepste caves are illustrated. They are mostly underwater and are therefore divers' caves.