The Apology of Al-Kindy, written at the court of Al Mâmûn <circa A.H. 215 ; A.D. 830>, in defence of christianity against Islam. With an essay on its age ... [...] / Abd-al-Masīḥ Ibn-Isḥāq al-Kindī; ʿAbdallāh Ibn-Ismāʿīl al-Hāšimī. London : Knowledge, 1887