NICHOLAS VINCENT is Professor of Medieval History at the University of East Anglia and a Fellow of the British Academy Daniel Power is Professor of Medieval History at Swansea University. He is the author of a number of works concerning France and the British Isles in the Central Middle Ages, including The Norman Frontier in the Twelfth and Early Thirteenth Centuries (2004). He is a Fellow of the Society of Antiquaries (of London) and of the Royal Historical Society. DAVID CROOK, now retired, spent his working life in The National Archives, where he became immersed in the extensive surviving early records of the English royal administration and common law. From those sources have emerged important findings which may identify a real criminal as the original of the legendary English outlaw Robin Hood. David Crouch is a fellow of the British Academy and author of a number of editions of medieval documents, most recently The Acts and Letters of the Marshal Family (2015) for the Camden Society. He has written extensively on medieval politics and society, and was also editor of Volume 10 (Howden and Howdenshire) of the Victoria History of Yorkshire East Riding. MARK HAGGER is a reader in medieval history at Bangor University. NICHOLAS VINCENT is Professor of Medieval History at the University of East Anglia and a Fellow of the British Academy