His report, which became known as the Grojanowski Report, was smuggled out of the ghetto through the channels of the Polish underground, reached London and was published by June.
Laporannya, yang kemudian dikenal sebagai Laporan Grojanowski, diselundupkan keluar dari ghetto melalui saluran-saluran "bawah tanah" Polandia kepada Delegatura, dan tiba di London pada bulan Juni 1942.