1. Princeton University, Islamic Manuscripts Garrett no. 5515Y DS ID: DS28728 Title: Risālah tataʻallaqu bi-wujūb taqdīm al-mūṣil ilá al-taṣawwur ʻalá mabāḥith al-mūṣil ilá al-taṣdīq Author: Ibrāhīm ibn Muḥammad ʻIṣām al-Asfarāyīnī Date: 1800-1899