WIA GC/1921/251 | Hübner, Friedel to Warburg, Mary [September 1921] | thanks her for letter; she has still not found a school for daughter Liesel; son Hansel [Hans] is... |
WIA GC/1921/252 | Hübner, Friedel to Warburg, Mary [November 1921] | thanks her for a letter which Mary wrote on Friedel's birthday; they are still living in... |
WIA GC/1922/211 | Hübner, Friedel to Warburg, Mary 15/05/1922 | she is thinking of Mary and her family often, but her life is very hard; Else is helping her with... |