Schwertzel, Anna von
| Louis Spohr an Felix Mendelssohn Bartholdy in Berlin | Kassel, Freitag 7. November 1845 | 1845110711 |
| Charles Edward Horsley an Louis Spohr in Kassel | London, Dienstag 2. Mai 1848 | 1848050244 |
| Louis Spohr an Felix Mendelssohn Bartholdy in Berlin | Kassel, Freitag 7. November 1845 | 1845110711 |
| Charles Edward Horsley an Louis Spohr in Kassel | London, Dienstag 2. Mai 1848 | 1848050244 |