Klees, Johann Georg
| Louis Spohr an Wilhelm Speyer in Offenbach | Kassel, Montag 9. Januar 1826 | 1826010902 |
| Louis Spohr an Wilhelm Speyer in Offenbach | Kassel, Freitag 16. April 1830 | 1830041602 |
| Louis Spohr an Wilhelm Speyer in Offenbach | Kassel, Montag 9. Januar 1826 | 1826010902 |
| Louis Spohr an Wilhelm Speyer in Offenbach | Kassel, Freitag 16. April 1830 | 1830041602 |