Mechetti <Wien>
| Pietro Mechetti an Louis Spohr in Kassel | 1839042056 |
| Pietro Mechetti an Louis Spohr in Kassel | 1839111156 |
| Pietro Mechetti an Louis Spohr in Kassel | 1839120356 |
| Pietro Mechetti an Louis Spohr in Kassel | 1841031056 |
| Pietro Mechetti an Louis Spohr in Kassel | 1841100456 |
| Pietro Mechetti an Louis Spohr in Kassel | 1842031156 |
| Pietro Mechetti an Louis Spohr in Kassel | 1843041356 |
| Pietro Mechetti an Louis Spohr in Kassel | 1843090156 |
| Louis Spohr an Carl Friedrich Peters in Leipzig | Gotha, Mittwoch 13. September 1815 | 1815091320 |
| Louis Spohr an Carl Friedrich Peters in Leipzig | Thierachern, Sonntag 18. August 1816 | 1816081820 |
| Carl Friedrich Peters an Louis Spohr in Leipzig | Leipzig, zwischen 8. und 19. September 1825 | 1825091450 |
| Louis Spohr an Wilhelm Speyer in Frankfurt am Main | Kassel, Donnerstag 3. Dezember 1840 | 1840120302 |
| Julius Schuberth an Louis Spohr in Kassel | Hamburg, Mittwoch 9. Juni 1841 | 1841060955 |
| Louis Spohr an Eduard Grund in Meiningen | Kassel, Dienstag 4. Januar 1842 | 1842010409 |
| Louis Spohr an Moritz Hauptmann in Leipzig | Kassel, Dienstag 25. April 1843 | 1843042503 |
| Louis Spohr an Friedrich Schneider in Dessau | Kassel, Donnerstag 14. Januar 1847 | 1847011412 |