WIA GC/27448 | Warburg, Aby to Warburg, Mary 16/02/1902 | he has found book titles in Fr. v. Lipperheide's publications; he visited [F.] Sarre, Otto... |
WIA GC/27451 | Warburg, Mary to Warburg, Aby 17/02/1902 | thanks for two letters; encourages him to stay on in Berlin; is pleased to read that Warburg is... |
WIA GC/689 | Justi, Emy to Warburg, Aby 03/03/1902 | thanks him for a copy of his book, 'Bildniskunst'; praises its high quality and scholarship |