Offenbach, Jacques
| Bernhardine Hildebrand-Romberg an Louis Spohr in Kassel | Paris, Mittwoch 8. Januar 1851 | 1851010843 |
| Bernhardine Hildebrand-Romberg an Louis Spohr in Kassel | Paris, Dienstag 1. April 1851 | 1851040143 |
| Bernhardine Hildebrand-Romberg an Louis Spohr in Kassel | Paris, Mittwoch 8. Januar 1851 | 1851010843 |
| Bernhardine Hildebrand-Romberg an Louis Spohr in Kassel | Paris, Dienstag 1. April 1851 | 1851040143 |