puzzled by the internal geography of Great Britain; thus it is that the author of the French Prose Tristan appears to place Léonois beside Cornwall. In English adaptations of the French tales, Léonois, now "Lyonesse", becomes a kingdom wholly distinct from Lothian, and closely associated with the Cornish region, though its exact geographical location remained unspecified. The name was not attached to Cornish legends of lost coastal lands until the reign of Elizabeth I of England. However, the legendary lost land between Land's End and Scilly has a distinct Cornish name: Lethowsow. This derives from the Cornish name for the Seven Stones Reef, on the reputed site of the lost land's capital and the site of the notorious wreck of the . The name means 'the milky ones', from the constant white water surrounding the reef. Alfred, Lord Tennyson's Arthurian epic Idylls of the King describes Lyonesse as the site of the final battle between King Arthur and Mordred (King Arthur's nephew and illegitimate son). One passage in particular references legends of Lyonesse and its rise from (and subsequent return to) the ocean: Then rose the King and moved his host by night And ever pushed Sir Mordred, league by league, Back to the sunset bound of Lyonesse— A land of old upheaven from the abyss By fire, to sink into the abyss again; Where fragments of forgotten peoples dwelt, And the long mountains ended in a coast Of ever-shifting sand, and far away The phantom circle of a moaning sea. Analogues in Celtic mythology The legend of a sunken kingdom appears in Cornish, Breton and Welsh mythologies. In Christian times, it came to be viewed as a sort of Cornish Sodom and Gomorrah, an example of divine wrath provoked by unvirtuous living. A Breton parallel is found in the tale of the Cité d'Ys or Ker Ys, similarly drowned as a result of its debauchery, with a single virtuous survivor, King Gradlon, escaping on a horse. Acoording to Welsh legend, the kingdom of Cantre'r Gwaelod in Cardigan Bay was drowned due to the drunkard negligence of its prince, Seithenyn, who allowed the sea to sweep through the floodgates. The tale of Lyonesse is sometimes suggested to represent an extraordinary survival of folk memory of the flooding of the Isles of Scilly and Mount's Bay near Penzance when the sea levels rose during the Bronze Age. For example, the Cornish