Pedzisa mutsara unotevera: Lorentowicz akaberekerwa muPabianice, iri pakati pePoland yemazuva ano, muna 1868, makore mashanu pashure pokuvhurwa kwe
Kumukira kwePoland kwa1863 uko pakupedzisira kwakadzvinyirirwa neRussian Imperial Army. Vabereki vake vakanga vatamira kuPoland yanhasi iri pakati kubva kumuganhu wekare wokumabvazuva we"Kresy", vachitiza urombo nokudzvinyirirwa. Jan akawana dhigirii rake rechikoro chesekondari kuPłock nenzira yekudzidzira kumba uye nokukurumidza akaenda kuFrance, kwaakagara kusvikira muna 1903 uye akadzidza paSorbonne.