1. University of Pennsylvania, Ms. Codex 1393 DS ID: DS1093 Title: Ledger Author: Lorenzo Gondi Place: Italy Date: 1542-1618.
2. University of Pennsylvania, Ms. Codex 1491 DS ID: DS1373 Title: Miscellany Place: Italy Date: 1520-1526, 1532.
3. University of Pennsylvania, Ms. Codex 1528 DS ID: DS1396 Title: Sketchbook Place: Piacenza Date: 1599.