TYERMAN, Christopher. British, b. 1953. Genres: History. Career: Hert- ford College, Oxford, Oxford, England, lecturer in modern history. Publications: England and the Crusades, 1095-1588, 1988; Who's Who in Early Medieval England, 1066-1272, 1996; The Invention of the Crusades, 1998; A History of Harrow School, 1324-1991, 2000. Address: Faculty of Modern History, Hertford College, University of Oxford, Broad Street, Oxford OX1 3BD, England.