Weber, Carl Maria von : Die drei Pintos
| Carl Friedrich Peters an Louis Spohr in Kassel | Leipzig, Freitag 4. Juni 1824 | 1824060450 |
| Wilhelm Speyer an Louis Spohr in Kassel | Frankfurt am Main, Donnerstag 1. August 1833 | 1833080132 |
| Carl Friedrich Peters an Louis Spohr in Kassel | Leipzig, Freitag 4. Juni 1824 | 1824060450 |
| Wilhelm Speyer an Louis Spohr in Kassel | Frankfurt am Main, Donnerstag 1. August 1833 | 1833080132 |