On 19 October 1939 they moved to Delft having found a flat there. However, Blumenthal only found one Delft student to tutor and he had to live on charity, at first provided by the Protestant Hulpcomite.
Sa 19 Oktubre 1939 sila inilipat sa Delft pagkakaroon ng isang patag doon. Gayunman, Blumenthal lamang natagpuan ang isang Delft mag-aaral upang turuan at niya na manirahan sa kawanggawa, sa unang ibinigay ng Protestante Hulpcomite.