Correspondence 1903-1933, 1936, with Diego Abad de Santillán c. 1921-1926, Alexander Berkman c. 1910, 1922-1930, Walter Borgius 1907-1908, 1912, 1924, 1929-1931, Gustave Brocher c. 1918-1925, Victor Dave 1910-1914, 1919-1923, Ferdinand Domela Nieuwenhuis c. 1904-1919, Emma Goldman 1912, 1919-1925, Hippolyte Havel 1903-1926, Thomas Keell 1904-1907, 1919-1930, Peter Kropotkin c. 1901-1907, 1912-1913, Gustav Landauer 1907-1912, 1919, Errico Malatesta 1905, 1912, 1923, 1926-1929, Olga Misar 1917-1930, 1933, Erich Mühsam 1912, 1924, 1927, 1929, 1932, Josef and Maria Peukert 1908-1913, Eugen Relgis 1924-1926, 1928-1932, Emil Szittya c. 1923, 1927 and many others; letters and postcards by Ramus to members of his family and friends 1938-1942; counterfeit passports and calling cards c. 1920, 1924; manuscripts and drafts of books, articles and speeches, with notes (also some by Max Nettlau) 1898-1934, including his unpublished `Marx, Engels und Bakunin' 1922-1923; manuscripts of books, articles and poems by James Guillaume and other authors 1890, 1893-1933; manuscripts of translations; documents relating to the editing of periodicals 1902-1903, 1906-1933; documents on trials against Ramus 1909-1914; membershipcards 1900-1932; documents on congresses of international anarchist and antimilitarist organizations 1907, 1919-1931; collected documents, including correspondence by others relating to Eugen H. Schmitt, documents on trials against anarchists and documents on the Johann Neve case 1888, 1894-1927; some correspondence and other documents concerning Ramus 1947-1991; pamphlets, leaflets, press clippings and other printed material relating to many countries including Austria, Germany, Russia, Switzerland and the USA 1826, 1872-1936. Papers of relatives: some letters and documents of his wife Sonja Grossmann-Friedmann c. 1905-1935 and his daughter Lilly Schorr-Grossmann c. 1919, 1924-1928, 1961-1981.