Gertrud Hartwig wrote two letters to the Jewish Congregation in Hamburg asking for support in returning to Germany from exile. The second letter includes a request to forward a message to a Mrs. Feder
Letter from Gertrud Hartwig to the Jewish Congregation in Hamburg, Karachi, December 4, 1946 (translated by Erwin Fink), edited in: Key Documents of German-Jewish History, <https://keydocuments.net/source/jgo:source-294> [October 29, 2025].
