WIA GC/1905/373 | Warburg, Aby to Goldschmidt, Mayer Seligmann [?] 17/03/1905 | Warburg's belief in Lichtwark's genius is shaken; on the puritan bourgeois Hamburg soul in... |
WIA GC/1907/261 | Poeseldorfer Schachclub von 1882 to Warburg, Aby 13/08/1907 | silver jubilee of the chess club; invitation to a club evening; enclosure: text of a song... |
WIA GC/1909/171 | Warburg, Aby to Graul, Richard Ernst 09/10/1909 | thanks him for an invitation to give a lecture; postpones it until next winter as he has to do... |
WIA GC/1909/19 | Beindorff, Fritz to Warburg, Aby 20/12/1909 | refers to Warburg's letter of 11/12/1909, re Hugo Vogel; following Beindorff's conversation with... |
WIA GC/1909/263 | Warburg, Aby to Justi, Ludwig 03/06/1909 | requests information whether the Royal Academy of Arts [in Berlin] did or said anything to Hugo... |