Kazatel, Johann
| Wilhelm Happ an Louis Spohr in Kassel | Prag, Montag 11. November 1839 | 1839111140 |
| Wilhelm Happ an Louis Spohr in Kassel | Prag, Dienstag 24. November 1840 | 1840112440 |
| Wilhelm Happ an Louis Spohr in Kassel | Prag, Montag 11. November 1839 | 1839111140 |
| Wilhelm Happ an Louis Spohr in Kassel | Prag, Dienstag 24. November 1840 | 1840112440 |