Kew
| Louis Spohr an Carl Koßmaly in Detmold | Kassel, Freitag 1. November 1844 | 1844110113 |
| George French Flowers an Louis Spohr in Kassel | Montag, 28. Februar 1848 | 1848022843 |
| Henry Blagrove an Louis Spohr in Kassel | London, Dienstag 8. August 1848 | 1848080840 |
| Gottfried Herrmann an Louis Spohr in Kassel | Lübeck, Sonnabend 12. Januar 1856 | 1856011240 |