Berly, Carl Peter
| Wilhelm Speyer an Louis Spohr in Kassel | Offenbach, Donnerstag 17. September 1829 | 1829091732 |
| Wilhelm Speyer an Louis Spohr in Kassel | Frankfurt am Main, Mittwoch 1. Mai 1833 | 1833050132 |
| Wilhelm Speyer an Louis Spohr in Kassel | Offenbach, Donnerstag 17. September 1829 | 1829091732 |
| Wilhelm Speyer an Louis Spohr in Kassel | Frankfurt am Main, Mittwoch 1. Mai 1833 | 1833050132 |