10951. Harvard University, MS Arab 343 Title: Niẓām fī al-lughah Author: Shaykh ʻAbd Allāh Date: 690 [1291
10952. Harvard University, MS Arab 290 Title: Kitāb fī al-lughah al-ʻArabīyah Author: Abu-'l-Ḥasan ʿAlī Ibn-ʿAbdallāh Ibn-Muḥammad an- Nubāhī Date: 955 [1548 or 1549
10953. Harvard University, MS Arab 82 Title: Kitāb fī al-lughah Author: Abu Hatim Muhammad ibn Idris al-Razi Date: 800 [1397 or 1398
10954. Harvard University, MS Arab 352 Title: Kitāb fī al-lughah al-ʻArabīyah Author: Sibawayh Date: 833 [1429 or 1430