upper Silesia. Letter from the Polish Society for Relief of War Victims, dated 30.12.1920, signed by Stanislaw Belza (1849-1929), a cultural activist in Silesia, lawyer, writer, traveler and brother of Wladyslaw Belza, printed and typescript, stamp with inscription: Silesia must be ours; tears and trace of flooding, traces of folding, yellow spots; dimensions approx. 218x280 mm.