WIA GC/1902/321 | Wolfhagen, G. to Warburg, Aby 24/02/1902 | list of people who were sent copies of Warburg's article 'Bildniskunst', 18 in Germany, 15 in... |
WIA GC/1902/334 | Oppenheim, Moritz to Warburg, Aby 24/02/1902 | he cannot allow Warburg to visit mother at the moment, as she needs to rest; they can meet in the... |
WIA GC/1921/349 | Oppenheim, Moritz Nathan to Warburg, Aby 18/10/1921 | offers his condolence on the death of Warburg's mother, his sister, on October 2nd; greetings... |