A series of sediment samples were taken from Goatchurch Cavernand Sidcot Swallet in order to reconstruct the conditions of deposition within the cave systems and also the conditions prevailing in the Burrington Combe area as a whole. Little evidence could be found to suggest any stream-laid sedimentation in Sidcot Swallet and only a discrete deposition of similar stream sedimenst could be identified in Goatchurch Cavern. It is tentatively considered that Goatchurch Cavern and Sidcot Swallet were connected prior to the downcutting of the West Twin Brook Valley. A new survey is presented of Sidcot Swallet.