1. University of Pennsylvania, Ms. Codex 1321 DS ID: DS1039 Title: Ledger Place: Italy Date: 1465-1494.
2. University of Pennsylvania, Ms. Codex 1322 DS ID: DS1040 Title: Ledger Author: Luigi de' Medici Place: Italy Date: 1495-1544.
3. University of Pennsylvania, Ms. Codex 1435 DS ID: DS1355 Title: Ledger Place: Italy Date: 1456-1495.