Ibn Nuh has said that first of all Abul Husain Muhammad bin Ali bin Tamam has narrated that he quoted this epistle from the manuscript that was in the possession of Abul Hasan bin Dawood and when he came, I read out that copy to him and he also said that the same copy was sent by the people of Qom to Husain bin Rauh and its reply arrived written on its back by Ahmad bin Ibrahim Naubakhti and this copy was obtained from Abul Husain bin Dawood.