1. The Huntington Library, Art Museum, and Botanical Gardens, mssEL 26 A 13 DS ID: DS9598 Title: De regimine principum Author: Thomas Hoccleve Place: England Date: approximately 1450.
2. Harvard University, MS Typ 195 DS ID: DS11091 Title: De regimine principum Author: Giles of Rome Date: ca. 1455