de Neufville, Johann Robert
| Carl Friedrich Peters an Louis Spohr in Kassel | Leipzig, Sonnabend 19. April 1823 | 1823041950 |
| Carl Friedrich Peters an Louis Spohr in Kassel | Leipzig, Freitag 13. Mai 1825 | 1825051350 |
| Carl Friedrich Peters an Louis Spohr in Kassel | Leipzig, Sonnabend 19. April 1823 | 1823041950 |
| Carl Friedrich Peters an Louis Spohr in Kassel | Leipzig, Freitag 13. Mai 1825 | 1825051350 |