The Arthurian Formula, the last major work of Dion Fortune, formed the cornerstone of the inner work of her Society of the Inner Light for the following twenty years. It later formed the basis for work by Gareth Knight with the Company of Hawkwood and allied groups in later years, inspiring his book The Secret Tradition in Arthurian Legend. Dion Fortunes contribution explores the remote sources of the Arthurian legends and the mission of Merlin, played out in the polar relationships between Arthur, Guenivere and Lancelot in both human and faery dynamics, and leading to aspects of the Grail. explores the labyrinth of archetypal patterns of knights and ladies, including Morgan le Fay Gareth Knights commentary is an overview of the traditions behind the Arthurian Formula of Glastonbury, Atlantis, the world of Faery, Merlin, the Troubadours, the cult of Queen Venus application to the practical Mysteries of today