Zimmermann, August
| Adolph Hesse an Louis Spohr in Kassel | Breslau, Freitag 3. Januar 1840 | 1840010331 |
| Eduard Otto an Louis Spohr in Kassel | Braunschweig, Sonntag 23. August 1844 | 1844082346 |
| Christian Friedrich Lueder an Louis Spohr in Kassel | Katlenburg, Montag 16. September 1844 | 1844091635 |
| Louis Spohr an August Pott in Oldenburg | Braunschweig, Sonntag 29. September 1844 | 1844092907 |
| Louis Spohr an Adolph Hesse in Breslau | Kassel, Donnerstag 31. Oktober 1844 | 1844103101 |