WIA FC/1887/8/40 | Warburg, Aby to Warburg, Charlotte 17/11/1887 | is sorry to read that uncle Max [Rosenbacher] has to spend a few more weeks in Frankfurt; asks... |
WIA FC/1888/13/1 | Warburg, Aby [list of his friends] [1888] | a list of names of Warburg's friends and spoof etymologies of names: H. Nippen: president of... |
WIA FC/1894/7/19 | Warburg, Charlotte to Warburg, Aby 16/03/1894 | she is pleased that Warburg has written to his sister Olga and has sent a cable with birthday... |
WIA GC 1930/1407 | KBW to Hartz, Otto 01/04/1930 | |
WIA GC/1887/10 | Ruben, Paul to Warburg, Aby 15/10/1887 | mentions Ernst Levy, Wilhelm Kiesselbach, John [Johann Nicolaus] Hertz, Johannes [Hans] Nippen... |