Spohr, Louis : Requiems, WoO 74
| Johann Gottfried Schade an Louis Spohr in Kassel | Gotha, Mittwoch 18. Dezember 1822 | 1822121839 |
| Louis Spohr an Moritz Hauptmann in Leipzig | Kassel, Dienstag 17. November 1857 | 1857111703 |
| Louis Spohr an Wilhelm Speyer in Frankfurt am Main | Kassel, Freitag 27. November 1857 | 1857112702 |
| Louis Spohr an Wilhelm Speyer in Frankfurt am Main | Kassel, Donnerstag 18. Februar 1858 | 1858021802 |
| Louis Spohr an Moritz Hauptmann in Leipzig | Kassel, Dienstag 6. April 1858 | 1858040603 |