| Ref No | WIA GC/2778 |
| Title | Petersen, Marguerite; Magnus, Dora to Warburg, Aby 15/11/1907 |
| Writer | Petersen, Marguerite Anna; Magnus, Dora |
| Place1 | Grindelwald, Bear Hotel |
| Recipient | Warburg, Aby |
| Place2 | Hamburg |
| Date | 15/11/1907 |
| Format | manuscript, postcard |
| Contents | greetings |
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