He was arrested under suspicion of trafficking in German currency but released after a few weeks. He survived a period when Polish academics were murdered, his doctoral supervisor Lomnicki dying on the tragic night of 3 July 1941 when many massacres occurred.
Siya ay madakip sa ilalim ng pinagbibintangan ng trafficking sa German pera ngunit pinakawalan pagkatapos ng ilang linggo. He survived ng panahon kapag Polish akademya ay murdered, ang kanyang doktor superbisor Lomnicki nagwawakas sa trahedya gabi ng 3 Hulyo 1941 kapag maraming mga massacres naganap.