Wilhelm Braunschweig, Herzog
| Eduard Otto an Louis Spohr in Kassel | Braunschweig, Sonntag 23. August 1844 | 1844082346 |
| Eduard Otto an Louis Spohr in Kassel | Braunschweig, Donnerstag 12. September 1844 | 1844091246 |
| Christian Friedrich Lueder an Louis Spohr in Kassel | Katlenburg, Montag 20. Januar 1845 | 1845012035 |
| Minna Müller an Louis Spohr in Kassel | Braunschweig, Donnerstag 4. Juni 1846 | 1846060445 |