WIA GC/10207 | Warburg, Aby to Warburg, Mary 22/10/1904 | detailed account of impressions in Düsseldorf; he met Professor [Eduard] Zacharias, also Jürgens... |
WIA GC/2472 | Zacharias, Eduard to Warburg, Aby 12/11/1906 | thanks him for the essay on the Flemish tapestries |
WIA GC/31986 | Warburg, Aby to Warburg, Mary 06/07/1908 | the previous evening he spent with [Gustaf F.] Steffen at Kösterberg; with Max [Warburg] were... |
WIA GC/32365 | Warburg, Max to Warburg, Aby 24/03/1911 | informs him that Professor [Eduard] Zacharias has died after an operation; it is a great loss for... |
WIA GC/32375 | Embden, Heinrich to Warburg, Aby 26/03/1911 | Warburg does not need to worry about Frede; Frede is clever, she has tried to exploit the... |