the book begins with the conquests of muhammad of ghor (1149-1206), and ends abruptly in 1434. several earlier royal chroniclers had written texts describing the 13th-15th century history of the delhi sultanate. for example, minhaj-i-siraj covered the period up to 1259 in his "tabaqat-i nasiri", ziauddin barani covered 1259-1356, and shams-i siraj afif covered 1356-1388. yahya carried forward this chronology all the way to 1434.