A day after the Germans suspended deportations, he wrote an open letter to the people of the ghetto on the name of the Jewish Battle Organization: To the Jewish Masses in the Ghetto On January 22, 1943, six months will have passed since the deportations from Warsaw began.
Den poté, co Němci pozastavili deportace, napsal jménem Židovské bojové organizace otevřený dopis lidem z ghetta: 22. ledna 1943 uplyne šest měsíců ode dne, kdy začaly deportace z Varšavy.