WIA GC/1906/785 | Zippel, O. to Warburg, Aby 27/11/1906 | thanks him for the essay of the Flemish tapestries |
WIA GC/1907/828 | Zippel, O. to Warburg, Aby 23/08/1907 | thanks him for Warburg's article on tapestries with a short medical article; they should meet to... |
WIA GC/1907/829 | Zippel, O. to Warburg, Aby 10/09/1907 | appointment |
WIA GC/1907/830 | Zippel, O. to Warburg, Aby 11/09/1907 | Meyer wants to give a lecture; Bärward as well |
WIA GC/1907/831 | Zippel, O. to Warburg, Aby 19/09/1907 | he has sent off the letters inviting lectures; he tries to find a third person to help him with... |