Reichenbach, Wilhelm von
| Wilhelm Speyer an Louis Spohr in Kassel | Frankfurt am Main, Mittwoch 25. November 1857 | 1857112532 |
| Louis Spohr an Wilhelm Speyer in Frankfurt am Main | Kassel, Freitag 27. November 1857 | 1857112702 |
| Wilhelm Speyer an Louis Spohr in Kassel | Frankfurt am Main, Mittwoch 25. November 1857 | 1857112532 |
| Louis Spohr an Wilhelm Speyer in Frankfurt am Main | Kassel, Freitag 27. November 1857 | 1857112702 |