Oliver Kahl, Ph.D. (1993), University of Manchester, is Research Fellow at the Department of Semitic Studies, University of Marburg, Germany. He has published several books (mostly with Brill) and numerous articles on the history of Arabic science and medicine. Henrietta Sharp Cockrell, formerly a specialist in the Islamic department at Christie’s, has contributed to several publications on Islamic art and manuscripts. She is currently cataloguing the National Trust Collections’ corpus of Islamic manuscripts.