Malcolm Todd is an Emeritus Professor of Archaeology and former Principal of Trevelyan College in the University of Durham. He is the author interalia of 'The Northern Barbarians' (Second Edition, Blackwell Publishing, 1987) and 'Roman Britain' (Third Edition, Blackwell Publishing, 1999), editor of 'The Blackwell Companion to Roman Britain' (Blackwell Publishing, 2003) and a contributor to 'The Cambridge Ancient History' and 'Der Neue Pauly'