Risālat ʿAbdallāh Ibn-Ismāʿīl al-Hāšimī ilā ʿAbd-al-Masīḥ Ibn-Isḥāq al-Kindī yadʿūhū bihā ila 'l-islām wa-Risālat ʿAbd-al-Masīḥ ila 'l-Hāšimī yaruddu bihā [...]. London : Rowington [?], 1880