Poet Simon Armitage examines the Arthurian legend's development through medieval literature and reveals that King Arthur is not the great national hero he is usually perceived to be. He was a fickle and transient character, appropriated by the Normans to justify their conquest. When French writers began adapting the story, he was cuckolded. It took Thomas Malory's masterpiece, "Le Mort d'Arthur," to restore his dignity and reclaim him as the national hero we know today.