The importance of documentary sources for the history of the official postal system (barīd) in the first century of Islam has long been acknowledged. In addition to a small number of documents from the eastern part of the Muslim Empire, Egyptian papyri from the 90s/710s and 130s/750s form the main documentary sources for modern studies on the postal system. These papyri belong to a distinct phase in Islamic history. Papyri from other, especially earlier, phases have largely been neglected. The present article addresses the history of Egypt's official postal system from the Muslim conquest up to c. 132/750. It argues that the postal system gradually developed out of Byzantine practices and was shaped by innovations by Muslim rulers through which their involvement in the postal system's administration gradually increased. The article ends with an edition of P.Khalili II 5, a papyrus document from 135/753 on the provisioning of postal stations.
