A Cipher of Eleanor of Navarre (1476)

I uploaded a short article "A Cipher between Eleanor of Navarre and her Father, John II of Aragon (1476)" presenting a simple cipher used between Eleanor of Navarre and her father, John II of Aragon (1476).

Imperial Ambassadors in the 1520s (Juan Manuel, Alonso Sanchez)

I added entries for Juan Manuel (imperial ambassador in Rome) and Alonso Sanchez (imperial ambassador in Venice) in "Unsolved Historical Ciphers". Searching archives may be more helpful than cryptographic methods for these ciphers with many nomenclature entries.