WIA FC/1907/5/38
Warburg, Aby to Warburg, Mary 27/09/1907
on a meeting of the local committee of the International Congress of the History of Art; the...
WIA GC/1907/7
Back, Friedrich to Warburg, Aby 19/10/1907
thanks him for a copy of his [Sassetti] essay
WIA GC/1910/7
Back, Friedrich to Warburg, Aby 17/05/1910
thanks him for a copy of Warburg's article, the critique of the Hamburg 'monumental style' [the...