Spohr, Louis : Lieder, Alt Kl, WoO 100
| Adolph Fabritius de Tengnagel an Louis Spohr in Kassel | Plön, Mittwoch 1. Mai 1839 | 1839050145 |
| Louis Spohr an Adolph Fabritius de Tengnagel in Plön | Kassel, Mai 1839 | 18390512016 |
| Adolph Fabritius de Tengnagel an Louis Spohr in Kassel | Plön, Freitag 9. November 1849 | 1849110946 |