1. University of Pennsylvania, LJS 312 Title: ʻIr siḥon. Author: Joseph ben Moses Sarfati Place: Spain Date: [14--]
2. University of Pennsylvania, LJS 472 Title: Ḥeshbon mahalkhot ha-kokhavim Author: Abraham bar Hiyya Place: Spain Date: [14--]
3. University of Pennsylvania, LJS 476 Title: Yesod ʻolam Author: Isaac Israeli ben Joseph Place: Spain Date: [1460?]
4. University of Pennsylvania, LJS 492 Title: Medical miscellany Place: Spain Date: [between 1425 and 1475]