Testimony of Mordchaj Mietek Jonisz, born in Radzymin, Poland, 1920, regarding his experiences as a partisan in Slonim and Bialystok Fighting as a partisan in Slonim, late 1941-October 1942; membership in the fighters' movement in the Bialystok Ghetto from December 1942; names of the fighters; surrounding of the ghetto by the Germans; fighting against the Germans by the partisans; falling of Jewish fighters; German deaths; participation of the Jewish police in the attack on the Germans; murder of approximately seventy [Jewish] fighters by Belorussian collaborators; [German] fighting using tanks against the [Jewish] fighters in the ghetto; hiding by the fighters after the liquidation of the ghetto; escape of fighters, including the witness, to forests in the Cyliczanki area(?); brave deeds of Srolek Felder, a partisan fighter in Bialystok; fighting of partisans as part of the Chaim Lipiczanski Brigade in the Bialystok area; brave deeds of the fighter, Heniek Wejsenberg.