WIA GC/1908/321
Lehmann, Wilhelm Ludwig to Warburg, Aby 15/08/1908
thanks him for essays
WIA GC/1909/355
Lehmann, Wilhelm Ludwig to Warburg, Aby 25/08/1909
cannot attend the congress; hopes to meet Warburg afterwards
WIA GC/1910/364
Lehmann, Wilhelm Ludwig to Warburg, Aby 14/05/1910
thanks for a copy of Warburg's article ['Die Wandbilder']; thanks for a postcard for an...