Bach, Johann Sebastian : Fürchte dich nicht, BWV 228
| Adolph Hesse an Louis Spohr in Kassel | Breslau, Donnerstag 19. April 1838 | 1838041931 |
| Carl Georg Firnhaber an Louis Spohr in Kassel | Hanau, Sonntag 19. November 1843 | 1843111948 |
| Adolph Hesse an Louis Spohr in Kassel | Breslau, Donnerstag 19. April 1838 | 1838041931 |
| Carl Georg Firnhaber an Louis Spohr in Kassel | Hanau, Sonntag 19. November 1843 | 1843111948 |