1. University of Pennsylvania, Ms. Codex 826 DS ID: DS1678 Title: De astronomia Author: Ǧābir Ibn-Aflāḥ Place: France Date: 1300?
2. University of Pennsylvania, Ms. Codex 827 DS ID: DS1679 Title: De improbatione concentricorum et epicyclorum Author: Henry of Langenstein Place: England Date: between 1362 and 1399