Hartmann, Johan Peter Emilius : Tonstücke in Liedform, Kl, op. 37
| Julius Schuberth an Louis Spohr in Kassel | Hamburg, Donnerstag 1. Juni 1843 | 1843060155 |
| Julius Schuberth an Louis Spohr in Kassel | Cannstatt, Montag 7. August 1843 | 1843080755 |
| Julius Schuberth an Louis Spohr in Kassel | Hamburg, Donnerstag 1. Juni 1843 | 1843060155 |
| Julius Schuberth an Louis Spohr in Kassel | Cannstatt, Montag 7. August 1843 | 1843080755 |