WIA GC/1906/280 | Hadeln, Detlev von to Warburg, Aby 12/02/1906 | thanks him for his essay 'Tod des Orpheus' |
WIA GC/1910/64 | Bode, Wilhelm to Warburg, Aby 13/05/1910 | complains what a youthful enthusiast Warburg is; Warburg is wrong if he thinks he can change the... |
WIA GC/1911/266 | Warburg, Aby to Friedländer, Max J. 03/03/1911 | D. von Hadeln will have sent him proofs by now [Hausbuchmeister]; informs him that he found a... |
WIA GC/1911/319 | Hadeln, Detlev von to Warburg, Aby 04/02/1911 | informs him that for the time being he is in charge of the editorial work of the Yearbook; [Max J... |
WIA GC/1911/320 | Warburg, Aby to Hadeln, Detlev von 05/02/1911 | he cannot tell him by which date he will have written an article until he has a good photograph... |