Contributor
- Bonelli, Hieronimo, 15..-15.. (Addressee)1
- Borein, Edward1
- Bowden, J.J.1
- Bower, B.M.1
- Braitmichel, Kaspar, d. 1573 (Scribe)1
- Carvajal, Bernardino de 1456-1523 (Named party)1
- Cecil, William, Lord Burghley, 1520-1598 (Addressee)1
- Cesi, Federico, 1500-1565 (Addressee)1
- Charles Borromeo, saint, 1538-1584 (Signatory)1
- Charles, Tom Mrs.1
- Cibo, Innocenzo, 1491-1550 (Named party)1
- Cincius Romanus (1380/90–1445) (Signatory)1
- Clement VII, Pope, 1478-1534 (Signatory)1
- Clemente D'Olera, 1501-1568 (Signatory)1
- Cornelius, Fred1
- Crispo, Tiberio, 1497-1566 (Signatory)1
- Cullum, R.1
- Dandino, Anselmo, 1546-1608 (Addressee)1
- Darby, A.C.1
- DeGrazia, Ettore T.1