OXIA PALUS "MADONNA" LEONARD DA VINCILeonardo da Vincis Virgin of the Rocks (1495 1508) is currently held in The National Gallery, London. For an artist who notoriously left works unfinished and from whom even fewer survive, this is a rare example of one of his large scale paintings. But hidden beneath is a sketch of an alternative scene of The Virgin and Christ Child in a mysterious rocky landscape. Much debate surrounds the Virgin of the Rocks, and its twin in the Louvre. But it is