Letter from Henryk Elzenberg written 07.06.1951

Letter from Kazimierz Twardowski written 25.02.1928

Postcard to Kazimierz Twardowski written 29.05.1924

Letter from Bogdan Suchodolski written in 20.10.1945

Postcard from Wacław Borowy written 17.05.1922

Letter from Stefan Morawski written N/D

Letter from Irena Krońska written in 04.04.1955

Letter from Władysław Witwicki written 24.07.1923

Postcard from Edmund Husserl written 19.08.1932

Letter to the Committee of the Library of Classics of Philosophy written 03.09.1951

Letter from Władysław Witwicki written 21.02.1924

Postcard from Malvine Husserl written 28.03.1921