Correspondence with various individuals and institutions: L. Bakstansky, Emanuel Neuman, Brodetsky, Oskar Rabinowicz, Yosef Leftwich.
Jewish Colonial Trust (Jewish Colonial Bank in London), Youth Treasury (Fund for Cultural, Pioneering and Physical Training for Jewish Youth), Jewish State Party in Lithuania, Yad VaShem, Federation of Jewish Relief Organisations, Friends of The Hebrew University in Jerusalem.
Main topics: posting books and articles, financial matters and contributions.