3. University of Pennsylvania, LJS 312 Title: ʻIr siḥon. Author: Joseph ben Moses Sarfati Place: Spain Date: [14--]
4. University of Pennsylvania, Oversize LJS 481 Title: Ḥaṭṭ al-niqāb ʻan wujūh aʻmāl al-ḥisāb Author: Aḥmad ibn Ḥusayn Ibn al Qunfudh Place: Morocco Date: [between 14--? and 16--?]
5. University of Pennsylvania, Oversize LJS 496 Title: Treatise on practical mathematical calculation Place: Italy Date: [between 1475 and 1499]