This monograph deals with the history of Arabic text of the History of the Patriarchs of Alexandria and its Greek and Coptic sources. After an introductory chapter on the state of research concerning this Arabic text and a chapter on its two recensions, it is demonstrated that the work of collecting the sources and translating them into Arabic must be attributed to the Alexandrian layman Mawhub Ibn Mufarrig, who lived in the eleventh century A.D., rather than to the famous theologian, Sawirus (Severus) Ibn al-Muqaffa', bishop of al-Ashumunayn in the mid tenth century, to whom this achievement is traditionally ascribed. The three remaining chapters deal with the precise identification of the Coptic sources, with the method of Coptic-Arabic translation, and with other aspects of Mawhub's editorial work.