This imaginative history of the Britons, written in the twelfth century, is the first work to recount the woes of Lear and the glittering career of Arthur. It rapidly became a bestseller in the British Isles and Francophone Europe, with over 200 manuscripts surviving. Here, an authoritative version of the text is presented with a facing translation, prepared especially for the volume. It also contains a full introduction and notes. MICHAEL REEVE is Kennedy Professor of Latin Emeritus at the Faculty of Classics, University of Cambridge; Dr NEIL WRIGHT is a Senior Language Teaching Officer at the Faculty of History, University of Cambridge.