Eugen Seidelmann an Louis Spohr in Kassel | Breslau, Donnerstag 28. August 1856 | 1856082845 |
Adolph Hesse an Louis Spohr in Kassel | Breslau, Donnerstag 25. September 1856 | 1856092531 |
Adolph Hesse an Louis Spohr in Kassel | Breslau, Freitag 3. April 1857 | 1857040331 |