A quick assortment of ʿAbd al-Ḥamīd's letters with his prolegomenon is considered his early perform.[three] In his Innovative age, ʿAbd al-Ḥamīd retired to Patna, from where he was summoned by Shah Jahān to jot down official chronicle of his reign on the advice of his grand vizier Nawab Saʿdallāh Kh