WIA GC/1912/113 | Boll, Franz to Warburg, Aby 10/09/1912 | thanks Warburg and Mary Warburg most warmly for their hospitality in Hamburg; compares it to life... |
WIA GC/1914/640 | Oehler, Richard to Warburg, Aby 29/06/1914 | invites Warburg to sign an appeal for setting up the Nietzsche Fonds to safeguard the work of Mrs... |
WIA GC/1924/150 | Warburg, Aby to Boll, Franz 03/02/1924 | thanks him for an article; advises him to check in [Wilhelm Heinrich] Roscher the verses under... |
WIA GC/1924/152 | Boll, Franz to Warburg, Aby 13/02/1924 | apologizes for late reply but he could not read Warburg's handwriting; on Perseus, refers Warburg... |
WIA GC/1924/320 | Eisler, Robert to Warburg, Aby 10/05/1924 | thanks him for Warburg's card, but could hardly read it; where did Warburg find the reference to... |