 With time, he secretly collected the necessary supplies for an escape.On 21 July 1944 they managed to cross the camp's gate together using a faked green pass, prepared by Bielecki.He was dressed in an "SS" uniform, assembled from parts of German uniforms bearing the Rottenführer insignia, stolen by Tadeusz Srogi (concentration camp number 178, a friend he made during transport to the camp), who had also supplied the form for the pass.