Although this volume deals with the part of al-Tabari's History covering the years 12 and 13 (633-35), in the caliphates of Abu Bakr al-Siddiq and 'Umar b. al-Khattab, the narratives contained in it, which are lengthy and detailed, are concerned with the first Muslim conquests in Iraq and Syria. Although it might be expected, therefore, that this volume would be a basic source for these conquests, the actual value of the bulk of the reported traditions is in considerable doubt because most of the material is derived from a later Kufan traditionist, Sayf b. 'Umar (d. 170-93/786-809), who...