WIA GC/1904/264 | Polaczek, Ernst to Warburg, Aby 17/08/1904 | the congress in Strasbourg has been cancelled; he comments on art historical publications in general |
WIA GC/1920/149 | Lenel, Walter to Warburg, Mary 04/02/1920 | writes to her as he does not want to write to Warburg; has heard from [Hans] Nirrnheim and from... |