1. University of Pennsylvania, Ms. Codex 1609 DS ID: DS1427 Title: Letters Author: William IV, Landgrave of Hesse-Kassel Place: Germany Date: after 1552
2. University of California, Berkeley, BANC MS UCB 276 DS ID: DS12453 Title: Letters Author: Hans Vinsterwalder Place: Kitzbühel and Austria Date: 1527.