Diaries and correspondence between Rocker and his wife Millie Witkop-Rocker, written during his internment in England in the First World War 1914-1918; correspondence with relatives 1917-1956; extensive correspondence with Angelica Balabanoff 1936-1951, Alexander Berkman 1927-1936, Armando Borghi 1931-1953, Ugo Fedeli 1951-1956, Mollie Steimer 1928-1957, Emma Goldman 1923-1940, Joseph Ishill 1924-1958, Albert de Jong 1931-1958, Arthur Müller Lehning 1933-1958, Jay and Jeanne Levey 1937-1958, Max Metzkow 1925-1944, Siegfried Nacht (Stephen Naft) 1929-1953, Max Nettlau 1930-1941, Franz and Alexandra Pfemfert 1941-1957, Helmut Rüdiger 1930-1958, Alfred Sanftleben 1928-1951, Diego Abad de Santillán 1935-1958, Augustin Souchy 1928-1958, Wilhelm Werner 1933-1939, Boris Yelensky 1946-1957 and with many other correspondents, especially in Germany and the USA; typescripts including his memoirs, the books Ǹationalism and Culture' and Ànarcho-Syndicalism' and many other publications; manuscripts by others; reports, circulars, some minutes, correspondence and other documents relating to the IWMA, the Confederación Nacional del Trabajo (CNT) and the Federación Anarquista Ibérica (FAI) 1932-1939, 1942-1957; reports, other documents and printed material on the Spanish Civil War 1932-1939; files on Ǹationalism and Culture' 1938-1954; on the Kropotkin Museum in Moscow, with some letters from Alexandra and Sophie Kropotkin. 1922-1932; on Erich and Zensl Mühsam with letters from them both 1928-1951; on Max Nettlau 1931-1946; some personal documents; printed and stencilled material, mostly circulars, articles and leaflets.
