Gesangverein <Basel>
| Ernst Reiter an Louis Spohr in Kassel | Basel, Donnerstag 22. Januar 1857 | 1857012240 |
| Ernst Reiter an Louis Spohr in Kassel | Basel, Montag 20. April 1857 | 1857042040 |
| Ernst Reiter an Louis Spohr in Kassel | Basel, Donnerstag 22. Januar 1857 | 1857012240 |
| Ernst Reiter an Louis Spohr in Kassel | Basel, Montag 20. April 1857 | 1857042040 |