Stephens, Charles Edward
| Charles Edward Stephens an Louis Spohr in Kassel | London, Mittwoch 1. Mai 1850 | 1850050144 |
| Charles Edward Stephens an Louis Spohr in Kassel | London, Dienstag 21. Mai 1850 | 1850052144 |
| Charles Edward Stephens an Louis Spohr in Kassel | London, Montag 26. Mai 1851 | 1851052644 |
| Charles Edward Stephens an Louis Spohr in Kassel | London, Freitag 11. Juli 1851 | 1851071144 |
| Louis Spohr an Charles Edward Stephens in London (erschlossen) | Kassel, zwischen 6. und 16. Mai 1850 | 1850051114 |
| Louis Spohr an Charles Edward Stephens in London (erschlossen) | Kassel, Juni 1851 | 1851061514 |
| Louis Spohr an Charles Edward Stephens in London | Kassel, Dezember? 1853 | 1853121514 |