Oldest Yemeni manuscript in Leiden

In the ninth and tenth centuries two Zaydi Imamates existed simultaneously, one in Yemen and one near the Caspian Sea in Northern Iran. A Caspian Imam wrote this work on Zaydi doctrine. Zaydi scholars later transmitted it from North Iran to Yemen. This copy of the book was most likely produced in Yemen and belonged to the Imam al-Manṣūr billāh ʿAbdallah b. Ḥamza (d. 1217). This manuscript was acquired by Leiden University from Amīn al-Madanī in 1883 and is the oldest Yemeni manuscript in the collection.

al-Muwaffaq billāh Abū ʿAbd Allāh al-Ḥusayn b. Ismāʿīl al-Ḥasanī, The second volume only of al-Iḥāṭa, Yemen, dated Šaʿbān 605/February-March 1209, f. 69b-70a (Or. 8409)