The manuscripts cover an extremely broad range of themes focusing on religion, scholarship, and literature – studies of the Koran, dogma, collections of Hadith (traditions concerning and sayings attributed to the Prophet), mysticism, law, philosophy, ethics, geography, medicine, grammar, lexicography, rhetoric, belles lettres, history, and Christian literature. Particularly noteworthy are the texts documenting contemporaneous events – for example, there is a ms with information about the tribal confederation in Mesopotamia of the Milli, made up of both Berbers and Kurds (Hs. or. 143). The text focuses on conflicts of three tribal leaders with the Arabs and the Ottoman, later the Turkish regimes. Oppenheim became friends with two of these men on his journeys in the Orient. It was the Milli who called his attention to the ruins of Tell Halaf. Copies in other libraries duplicate the larger number of the Oppenheim manuscripts which have in the meantime appeared in print.