WIA GC/28823 | Hertz, Eva to Warburg, Aby 19/09/1915 | thanks him for a beautiful card; [the picture of] Hindenburg on verso will also bring good wishes... |
WIA GC/29494 | Hertz, Wilhelm to Warburg, Aby 30/12/1920 | Christmas was fine, everybody is well; Mary and the children were with them on Boxing Day; wishes... |
WIA GC/29607 | Hertz, Wilhelm to Warburg, Aby 03/08/1921 | congratulates him on having been awarded the title 'university professor'; thanks him for Warburg... |
WIA GC/29609 | Hertz, Wilhelm to Warburg, Aby 27/11/1921 | thanks him for letter of 18/11/1921; regrets but cannot visit him due to work pressure; is very... |
WIA GC/29677 | Thurnham, Margaret to Warburg, Mary 15/11/1921 | thanks her for letter and photograph of Max Adolph; although she has last seen him seven years... |