1. Free Library of Philadelphia, Lewis E 167 DS ID: DS4515 Title: Tractatus moralis de virtutibus Author: William Perault Place: England and France Date: 1385-1399
2. The Huntington Library, Art Museum, and Botanical Gardens, mssHM 19999 DS ID: DS9945 Title: Decretals of Gregory IX Place: France Date: between 1285 and 1299].