Dr Iain Gardner is Chair and Senior Lecturer at the Department of Studies in Religion, Sydney University. He has published widely in Coptic and Manichaean studies, including the standard The Kephalaia of the Teacher (1995). He is also editor for the newly found Manichaean texts from the Dakhleh Oasis. Samuel Nan-Chiang Lieu is Professor of Ancient History and Co-Director of the Ancient History Documentary Research Centre, Macquarie University. He is the author of many books including The Roman Eastern Frontier and the Persian Wars II AD 363–630 (with G. Greatrex, 2002), From Constantine to Julian: Pagan and Byzantine Views (with D. A. S. Montserrat, 1996), The Roman Eastern Frontier and the Persian Wars AD 226–363 (with M. Dodgeon, 1991, revised 1994, 1996).