| Letter | Description | Signature | Date |
|---|---|---|---|
|
Carlo Pedrotti
>
Giulio Ricordi
Milano Source: Archivio Storico Ricordi |
LLET012946 > | No date |
|
Achille De Lauzières
>
Ricordi
No place Source: Archivio Storico Ricordi |
LLET009529 > | No date |
|
Emanuele Muzio
>
Eugenio Tornaghi
No place Source: Archivio Storico Ricordi |
LLET011514 > | No date |