Berlioz, Hector : Roi Lear
| Moritz Hauptmann an Louis Spohr in Kassel | Leipzig, Sonntag 5. Februar 1843 | 1843020543 |
| Christian Friedrich Lueder an Louis Spohr in Kassel | Katlenburg, Montag 1. Mai 1843 | 1843050135 |
| Eduard Otto an Louis Spohr in Kassel | Braunschweig, Donnerstag 12. September 1844 | 1844091246 |
| Louis Spohr an Adolph Hesse in Breslau | Kassel, Freitag 3. April 1846 | 1846040301 |