Schomburg, Carl
| Friedrich Christian Ruppe an Louis Spohr in Kassel | Meiningen, Dienstag 3. August 1824 | 1824080347 |
| Louis Spohr an Wilhelm Speyer in Offenbach | Kassel, Montag 15. November 1830 | 1830111502 |
| Friedrich Christian Ruppe an Louis Spohr in Kassel | Meiningen, Dienstag 3. August 1824 | 1824080347 |
| Louis Spohr an Wilhelm Speyer in Offenbach | Kassel, Montag 15. November 1830 | 1830111502 |