Robertson, Henry
| Henry Robertson an Louis Spohr in London | London, Freitag 2. Juli 1852 | 1852070247 |
| Henry Robertson an Louis Spohr in London | London, Dienstag 6. Juli 1852 | 1852070647 |
| Henry Robertson an Louis Spohr in London | London, Montag 12. Juli 1852 | 1852071247 |
| Henry Robertson an Louis Spohr in Kassel | Chertsey, Donnerstag 19. August 1852 | 1852081947 |
| Louis Spohr an Henry Robertson in Chertsey oder London | Kassel, Mittwoch 28. Juli 1852 | 1852072817 |
| Tagebucheintrag Marianne Spohr | London, Montag 19. Juli 1847 | 1847071990 |