1. University of Chicago, Codex Ms. 851 DS ID: DS16837 Title: Rhetoric text Author: George of Trebizond Date: ca. 1450
2. Newberry Library, VAULT Case MS 55 DS ID: DS17795 Title: Documentum de modo et arte dictandi et versificandi Author: Geoffrey of Vinsauf Place: England Date: between 1425 and 1475