WIA GC/26145 | Warburg, Charlotte to Warburg, Aby 26/03/1896 | acknowledges receipt of Warburg's letter with the explanations why he had to postpone his trip to... |
WIA GC/26234 | Warburg, Olga to Warburg, Aby 22/02/1896 | acknowledges receipt of [second] parcel of [American] Indian objects; on 26/02/1896 there will be... |
WIA GC/27198 | Warburg, Moritz to Warburg, Aby and Warburg, Mary 31/01/1900 | thanks them for their letter; calls Marietta 'their blue sky' at home; admonishes Warburg to... |
WIA GC/28423 | Brach, Rudolf to Warburg, Aby 21/07/1912 | Warburg's letter was forwarded to him in Tegernsee; he will be back in Hamburg at the beginning... |
WIA GC/3004 | Brach, Rudolf to Warburg, Aby and Warburg, Mary 26/04/1908 | offers his condolences on the death of Warburg's brother-in-law John [Johann Nicolaus Hertz] |