Luis, Ferdinand
| Ferdinand Luis an Louis Spohr in Kassel | Leipzig, Donnerstag 13. August 1846 | 1846081345 |
| Louis Spohr an Ferdinand Luis in Hamburg | Kassel, Sonnabend 22. August 1846 | 1846082215 |
| Ureli Corelli Hill an Louis Spohr in Kassel | New York, Donnerstag 28. Mai 1846 | 1846052840 |