WIA GC/1889/27 | Hertz, Johann Nicolaus; Melchior, [George]; Ruben, Paul and Strack, Max L. to Warburg, Aby 14/01... | New Year greetings from Hertz [signed Lbf= Leibfuchs], Strack, Melchior and Ruben on the back of... |
WIA GC/1890/13 | Hartz, Otto to Warburg, Aby 31/07/1890 | reports on the members of the student fraternity; H. B. deserves trust; [George] Melchior, his... |
WIA GC/1890/29 | Ruben, Paul to Warburg, Aby 31/03/1890 | he is working very much; he has been reading Latin with [Max L.] Strack; Strack, Becker and he... |
WIA GC/1915/679 | Ruben, Paul to Warburg, Aby 28/11/1915 | forwards a letter by Richard Robinow [no longer extant]; wants to convene a meeting of Warburg... |
WIA GC/1921/320 | Melchior, Elsa to Warburg, Aby 24/04/1921 | apologizes for not having written for a long time; there was nothing 'of value' to write about... |