WIA GC/1914/424 | Hertz, Wilhelm to Warburg, Aby 27/04/1914 | congratulates him on his success in Florence [lecture 'Der Eintritt des antikisierenden... |
WIA GC/1915/360 | 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/1920/125 | 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/1921/229 | Hertz, Wilhelm to Warburg, Aby 03/08/1921 | congratulates him on having been awarded the title 'university professor'; thanks him for Warburg... |
WIA GC/1921/231 | 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... |