Arthur lived at Windscheidstr. 9 in Berlin Charlottenburg prior to emigrating to Amsterdam on 14.08.1933. He was in a previous marriage with Frieda Gertrud Cohn, with whom he had two children, Selma Martha Heidemann (born 07.04.1915 in Berlin) and Hermann Georg Heidemann (Born 12.10.1917 in Berlin). (Amsterdam City Archive Card, Jewish Addressbook Berlin 1931)
I would appreciate any information about his children Selma and Hermann.