Musical Institute <London>
| 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 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 |