1. University of Pennsylvania, LJS 380 Title: Pros mathēmatikous Author: Sextus Empiricus Place: Italy Date: [between 1430 and 1450]
2. University of Pennsylvania, CAJS Rar Ms 228 Title: Los dos tratados del Papa Author: Cipriano de Valera Place: Spain Date: [after 1588]
3. University of Pennsylvania, Ms. Codex 699 Title: Summa aurea Author: William of Auxerre Place: France Date: [13--]