I found in the handwriting of Abu Ghalib Zurari that Abu Ja’far Muhammad Ibn Uthman Amari died at the end of Jamadiul Awwal of the year three hundred and five. Abu Nasr Hibatullah Ibn Muhammad Ibn Ahmad has mentioned that Abu Ja’far Amari died in the year three hundred and four and that he undertook this duty for about fifty years. People would carry their religious dues to him and letters to them would come with the same handwriting that they came during the lifetime of Hasan (a.s) addressing their important and vital issues of religious as well as worldly life and responding their queries with astonishing answers. May Allah please him and He be pleased with him. Abu Nasr Ibn Hibatullah says: Abu Ja’far Muhammad Ibn Uthman’s grave is near that of his mother in the street of gate of Kufa in the place where his houses and quarters were; which is now in the middle of the desert. May Allah sanctify his soul.