1. University of Pennsylvania, Ms. Codex 840 DS ID: DS1686 Title: Orthographia Author: Porcellio Place: Italy Date: 1460.
2. Cornell University, Archives 4600 Bd. Ms. 47 ++ DS ID: DS12143 Title: Miscellany Place: Erfurt Date: 1437.
3. Newberry Library, VAULT folio Case MS 64.1 DS ID: DS17992 Title: Glossary Place: Germany Date: 1407.