1. University of Pennsylvania, Ms. Codex 1559 DS ID: DS1411 Title: Scale of perfection Author: Walter Hilton Place: Italy Date: 1510.
2. The Huntington Library, Art Museum, and Botanical Gardens, mssHM 266 DS ID: DS9888 Title: Scale of perfection Author: Walter Hilton Place: England Date: between 1440 and 1460