Kastner, Johann Georg : Beatrice
| Gustav Schilling an Louis Spohr in Kassel | Stuttgart, Sonnabend 22. Februar 1840 | 1840022244 |
| Gustav Schilling an Louis Spohr in Kassel | Stuttgart, Donnerstag 2. April 1840 | 1840040244 |
| Gustav Schilling an Louis Spohr in Kassel | Stuttgart, Sonnabend 22. Februar 1840 | 1840022244 |
| Gustav Schilling an Louis Spohr in Kassel | Stuttgart, Donnerstag 2. April 1840 | 1840040244 |