WIA GC/1902/48 | Bonfort, Helene to Warburg, Aby 02/03/1902 | enjoys reading his book |
WIA GC/1904/30 | Bonfort, Helene to Warburg, Aby 07/06/[1904?] | supplies address where Warburg may obtain a reference for Miss Helene Höhnk |
WIA GC/1905/38 | Bonfort, Helene to Warburg, Aby 19/01/1905 | Warburg might possibly be approached by Heinrich Spiero from Berlin, who wants to establish an... |
WIA GC/1909/53 | Bonfort, Helene to Warburg, Aby 18/02/1909 | asks Warburg whether she can attend the next lecture using the ticket of Miss Marie Hirsch who... |
WIA GC/1909/54 | Bonfort, Helene to Warburg, Aby 27/02/1909 | thanks him for the lecture and speaks highly of his style |