WIA GC/14408 | Melchior, Elsa to Warburg, Aby 04/04/1923 | thanks him for an Easter card; she and Ruth [daughter?] like it very much; Ruth is four and a... |
WIA GC/17376 | Derenberg, Louise; Derenberg, Julius; Derenberg, Walter and Derenberg, Carl Julius to Warburg... | Louise sends birthday greetings; is sure that the new library building and events like Cassirer's... |
WIA GC/22314 | Warburg, Aby to Derenberg, Louise 09/11/1928 | congratulates her son Walter for having passed his Law exams so well; is pleased that he is going... |
WIA GC/22434 | Warburg, Max to Warburg, Aby 26/10/1928 | counters Warburg's complaints that his brothers do not reply to his letters; calls them... |
WIA GC/22436 | Warburg, Aby to Warburg, Max 02/11/1928 | thanks him for letters and article on H. Eckener; Warburg is impressed by Eckener, even if he... |