Mozart, Wolfgang Amadeus : Davide penitente
| Adolph Hesse an Louis Spohr in Kassel | Breslau, Donnerstag 19. April 1838 | 1838041931 |
| Ignaz van Houtem an Louis Spohr in Kassel | Aachen, Sonntag 23. Februar 1840 | 1840022347 |
| Ignaz van Houtem an Louis Spohr in Kassel | Aachen, Mittwoch 22. April 1840 | 1840042247 |
| Ignaz van Houtem an Louis Spohr in Kassel | Aachen, Donnerstag 21. Mai 1840 | 1840052147 |
| Louis Spohr an Wilhelm Happ in Prag | Kassel, Sonnabend 23. Mai 1840 | 1840052310 |
| Ignaz van Houtem an Louis Spohr in Kassel | Aachen, Dienstag 26. Mai 1840 | 1840052647 |
| Carl Georg Firnhaber an Louis Spohr in Kassel | Hanau, Sonntag 19. November 1843 | 1843111948 |
| Adolph Hesse an Louis Spohr in Kassel | Breslau, Dienstag 18. April 1854 | 1854041831 |