WIA GC/1913/875 | Warburg, Aby to Petersen, Carl, Nottebohm, H and Petersen, G. 14/12/1913 | on the court case against Schaul; supplies figures |
WIA GC/1917/545 | Petersen, Carl Wilhelm to Münzel, Heinrich 14/08/1917 | covering letter for his report to the heirs of Robert Münzel;detailed report on the Robert Münzel... |
WIA GC/1917/597 | Petersen, Carl Wilhelm to Warburg, Aby 12/09/1917 | the heirs of [Robert] Münzel, apart from Hugo Münzel in Innsbruck, agree with Warburg's proposal... |
WIA GC/1917/599 | Petersen, Carl Wilhelm to Warburg, Aby 14/09/1917 | acknowledges that ownership of the literary estate of [Robert] Münzel has passed to Warburg |
WIA GC/1917/602 | Petersen, Carl Wilhelm to Warburg, Aby 15/09/1917 | acknowledges receipt of Warburg's letter of 14/09/1917 together with Warburg's Last Will |