Career
In occupied Poland he had been assigned to the apartment of Felicia Lieber"s family and later aided them. He forged papers for them and ultimately became engaged to Felicia. Herden himself was sent to Dachau concentration camp in July 1944.
After the war Herbert and Ignacy looked for missing people, including Felicia, but Felicia was never foundation
Ignacy, now Yitzhak, Lieber would be instrumental in informing Yad Vashem of Herden. In addition to the Leiber family Herden had used what resources he had to give food and aid to other Jews.