1. University of Pennsylvania, Oversize Ms. Codex 1267 Title: Summa de vitiis Author: William Perault Place: Germany Date: [between 1475 and 1499]
2. Boston Public Library, MS q Med.260 Title: De institutione religiosorum Author: William Perault Place: Italy Date: 1380.
3. Free Library of Philadelphia, Lewis E 166 Title: Summa de virtutibus Author: William Perault Place: France
4. Free Library of Philadelphia, Lewis E 167 Title: Tractatus moralis de virtutibus Author: William Perault Place: England and France Date: 1385-1399
5. The Huntington Library, Art Museum, and Botanical Gardens, mssHM 25778 Title: De eruditione principum Author: William Perault Place: France Date: between 1300 and 1315
6. Ohio State University, Spec.Rare.MS.MR.Frag.319 Title: Summa de virutibus et vitiis Author: William Perault Place: Northern France Date: ca. 1275-1300