Bran was an ancient British hero with whom the bards identified Arthur, perhaps because Bran bore the title Arddu ("the Dark One," pronounced Arthū), and had a shrine at Glastonbury. Bran, whose emblem was the raven, had been defeated by his twin Beli in a certain "Battle of the Trees," and his head buried on Tower Hill, London, where ravens are still protected as a good-luck charm.