WIA FC/1921/20/27 | Warburg, Max to Warburg, Aby 21/09/1921 | Max has written a letter to a Secret Counciller [Geheimrat] discouraging him to visit Aby, as Aby... |
WIA FC/1921/20/28 | Warburg, Max to Warburg, Aby 09/10/1921 | thanks Aby for his wishes and expresses his hopes that Warburg's state might improve so he could... |
WIA FC/1921/20/29 | Warburg, Max to Embden, Heinrich 13/10/1921 | informs Embden about the death of Charlotte Warburg and asks him to inform Aby so they can... |
WIA GC 1931/586 | Embden, Heinrich to Saxl, Fritz 07/04/1931 | |
WIA GC/1900/59 | Mönckeberg, Carl to Warburg, Aby 30/11/1900 | did not like Toni O'Swald's [Antonie O'Swald's] second play; requests Warburg to forward a letter... |