WIA GC/1911/331 | Warburg, Aby to Hagelstange, Alfred 26/01/1911 | Warburg is interested in the papers by Ramboux and his collection of Italian paintings; if there... |
WIA GC/1911/332 | Warburg, Aby to Hagelstange, Alfred 23/04/1911 | Hagelstange's reply makes it clear that he has not received Warburg's letter; he repeats his... |
WIA GC/1917/74 | Boll, Franz to Warburg, Aby 24/03/1917 | apologizes for late reply; is very sorry that Warburg is not feeling well; everybody lives under... |