11. Harvard University, MS Arab 101 DS ID: DS11315 Title: Kitāb rasāʾil ʻilm al-uṣūl Author: Nūr al-Dīn al-Ḥusayn ibn al-Ḥasan ibn ʻAlī al-Shāfī al-ʻĀmilī Date: 319 [931 or 932
12. Princeton University, Islamic Manuscripts Garrett no. 2339Y DS ID: DS15349 Title: al-Jamharah fī al-lughah Author: Ibn Duraid Date: 900-999