WIA GC/1887/10 | Ruben, Paul to Warburg, Aby 15/10/1887 | mentions Ernst Levy, Wilhelm Kiesselbach, John [Johann Nicolaus] Hertz, Johannes [Hans] Nippen... |
WIA GC/1907/643 | Scheidt, Felix to Warburg, Aby 20/12/1907 | he sends apologies, but like H. Nippen cannot come to the meeting of the 'Corona' in Hamburg |
WIA GC/1910/327 | Warburg, Aby to Kiesselbach, Wilhelm 20/11/1910 | he is happy to support Kiesselbach's initiative to help 'poor' Felix Scheidt; forwards money |