It is hard to overstate the importance of this trilogy of prose romances in the development of the legend of the Holy Grail and in the evolution of Arthurian literature as a whole. They give a crucial new impetus to the story of the Grail by establishing a provenance for the sacred vessel - and for the Round Table itself - in the Biblical past; and through the controlling figure of Merlin they link the story of Joseph of Arimathea with the mythical British history of Vortigern and Utherpendragon, the birth of Arthur, and the sword in the stone, and then with the knightly adventures of...