1. University of Pennsylvania, Misc Mss Box 24 Folder 22 DS ID: DS2116 Title: Letter Author: Giacomo Tornieri Date: 1584.
2. Newberry Library, VAULT folio Case MS 5170 DS ID: DS17716 Title: Letter Author: Francesco I de' Medici Place: Italy and Ferrara Date: 1559 [that is, 1560] Feb. 22.