Alan Bowman is Camden Professor of Ancient History at the University of Oxford and a Fellow of the British Academy. He is author of Life and Letters on the Roman Frontier (2nd edition) (Routledge, 1998) and The Cambridge Ancient History Volume XI (editor) (0521263352). Averil Cameron is Warden of Keble College, Oxford. Her published works include The Later Roman Empire: AD 284–430 (Harvard University Press, 1993) and The Mediterranean World in Late Antiquity (Routledge, 1993). Peter Garnsey is Professor of the History of Classical Antiquity at the University of Cambridge. His previous publications include Food and Society in Classical Antiquity (0521641829) and The Evolution of the Late Antique World (with Caroline Humfress) (Orchard Academic, 2001).