Grünbaum, Adam
| Louis Spohr an Carl Friedrich Peters in Leipzig | Frankfurt am Main, Montag 2. November 1818 | 1818110220 |
| Louis Spohr an Carl Friedrich Peters in Leipzig | Frankfurt am Main, Dienstag 20. April 1819 | 1819042020 |
| Louis Spohr an Carl Friedrich Peters in Leipzig | Frankfurt am Main, Montag 2. November 1818 | 1818110220 |
| Louis Spohr an Carl Friedrich Peters in Leipzig | Frankfurt am Main, Dienstag 20. April 1819 | 1819042020 |