Reuven Amitai-Preiss, Ph.D. (1990) in Middle Eastern History, Hebrew University of Jerusalem, is Senior Lecturer in medieval Islamic history at the Hebrew University, and author of Mongols and Mamluks: The Mamluk-Ilkhanid War (Cambridge, 1995). David Orrin Morgan, Ph.D. (1977) in History at the School of Oriental and African Studies (SOAS) at the University of London, is Reader in the History of the Middle East at the University of London. He has written The Mongols (London, 1986) and Medieval Persia (London, 1988), and is editor of the Journal of the Royal Asiatic Society.