Five original and thirteen photocopies of letters by the German communist leader Klara Zetkin, 1916-1932, relating to the
communist and feminist movements in Germany; three letters by the German socialist leader Franz Mehring and his wife Eva,
1918, relating to political conditions in Germany; one letter by the German physicist Albert Einstein, 1932, relating to requests
for reprints of articles; one letter by the German socialist youth leader Willy Brandt, 1936, relating to proposed united
front activities with the German communist youth; and five letters by the German socialist leader Georg Ledebour, 1936-1939,
relating to the socialist movement.