The concluding pages of al-Ṭabarī's History cover the caliphates of al-Muʿtaḍid and al-Muktafī and the beginning of the reign of al-Muqtadir--altogether a period of 23 turbulent years in world history. Although al-Ṭabarī has woven skillful narratives and quoted important documents verbatim, much of the information consists of brief notes jotted down by an observant and well-placed contemporary who witnessed...