WIA FC/1894/7/15 | Warburg, Aby to Warburg, Charlotte 26/02/1894 | thanks for arranging credit facilities; Horace von Landau was astonished that Warburg's father... |
WIA GC/1900/95 | Weisbach, Werner to Warburg, Aby 01/12/1900 | he was sorry that he was not in Berlin when Warburg was there; informs him that [Karl] Count... |
WIA GC/1902/271 | Lanckoronski, Karl to Warburg, Aby 27/03/1902 | thanks him for the copy of his book, 'Bildniskunst' |
WIA GC/1902/61 | Brockhaus, Heinrich to Warburg, Aby 24/02/1902 | thanks him for a copy of his book ['Bildniskunst'] and the kind dedication; congratulates him on... |
WIA GC/1902/62 | Brockhaus, Heinrich to Warburg, Aby 28/02/1902 | acknowledges receipt of Warburg's books; thanks him; he will write a note about Warburg's... |