The early sections of the chronicle are devoted to brief histories of earlier Songhay dynasties, of the Mali Empire and of the Tuareg, and to biographies of the scholars and holymen of both Timbuktu and Djenné. The main part of the chronicle covers the history of the Songhay from the middle of the 15th century till the Moroccan invasion in 1591, and then the history of Timbuktu under Moroccan rule up to 1655. Al-Sadi rarely acknowledges his sources.