WIA GC/10639 | Warburg, Aby to Beck, Hermann 17/09/1907 | forwards an essay; remembers their conversation; Warburg subscribed to the 'Documente des Werdens... |
WIA GC/10697 | Warburg, Aby to Beck, Hermann 04/09/1907 | Warburg, as member of the interim committee of the International Congress of the History of Art... |
WIA GC/10794 | Warburg, Aby to Beck, Hermann 31/12/1907 | New Year greetings; thanks him for his comments on the Sassetti article, his 'opusculum', and the... |
WIA GC/2487 | Beck, Hermann to Warburg, Aby 07/11/1907 | thanks him very much for his essay |
WIA GC/28439 | Duncker, Arthur to Warburg, Aby 14/11/1912 | forwards stationery for Warburg to fill out specifiying titles and dates of his lectures in... |