David Sanders and his wife Clara Keizer were in hiding at a widow's house in the Eerste Helmersstraat in Amsterdam. Clara suffered from asthma and therefore visited a physiotherapist. David accompanied his wife. A member of the Kolonne Henneicke specialised in recognising Jews in the street arrested the couple at the end of August 1943. They were taken to the Henneicke office at the Noorder Amstel…