WIA GC/1659 | Herzfelder, Jacques to Warburg, Aby 11/09/1905 | thanks him for his article on the imprese amorose |
WIA GC/2156 | Herzfelder, Jacques to Warburg, Aby and Warburg, Mary 30/06/1906 | thanks them for their lovely present |
WIA GC/2251 | Magnus, Helene to Warburg, Aby 12/02/1906 | on her appointment and meeting with Professor Adolf von Hildebrand in Munich; she has rented a... |
WIA GC/25536 | Warburg, Charlotte to Warburg, Aby 25/06/1891 | they missed him on the previous day, the wedding day of Rosa Warburg; the trip on the Elbe did... |
WIA GC/25610 | Warburg, Olga to Warburg, Aby 06/05/1892 | Franziska [Jahns] and Olga have packed Warburg's trunk, mother has put in Warburg's book requests... |