Piatti, Alfredo
| Louis Spohr an Ferdinand David in Leipzig | Kassel, Dienstag 9. November 1852 | 1852110910 |
| John Ella an Louis Spohr in London | London, Montag 4. Juli 1853 | 1853070413 |
| Louis Spohr an Ferdinand David in Leipzig | Kassel, Dienstag 9. November 1852 | 1852110910 |
| John Ella an Louis Spohr in London | London, Montag 4. Juli 1853 | 1853070413 |