Clues to T.C. Lethbridge's books lie in their subtitles. Witches: Investigating an Ancient Religion is no exception. In his study of the old pagan gods of Britain, Lethbridge believed that witch cults had their roots in prehistory and eventually became a religion of the suppressed classes.Similarities between eastern and ancient western religions provided him with evidence of ancient collusion. He believed Britain's island status acted as a filter for external inflences and ideas. No belief on the continent ever arrived intact which made the study of British customs so intriguing.