Marx & Engels Internet Archive: Letters
Collected Correspondence
From Marx & Engels, 1833-49: Comprehensive Collection of 180 letters
From Marx & Engels, 1850-59: Broad Selection of over 180 letters
From Marx & Engels, 1860-69: Broad Selection of over 300 letters
From Marx & Engels, 1870-95: Selection of over 230 letters
Jenny Von Westphalen (Marx): Letters 1839-69
Letters Subject Archives
Letters on Capital: mainly 1850 - 1869
Letters on Working Class Organisation and the trade unions: 1844-93
Letters on Dialectics: 1844-95
Letters on America: 1860-93
Letters on Anarchism, Proudhon & Bakunin: 1846-87
Letters on Ireland & the Fenians: mainly after 1867
Letters on Military Science and War: mainly 1851-63
Letters on Natural Science and Mathematics: 1858-91
Letters on France: 1840-91
Letters on the Socialist Movement in England: 1881-94
Selected Correspondence
Marx to Engels: 1859-77
Engels to Marx: 1844-82
Engels to August Bebel: 1873-91
Marx to Ruge: 1843
Engels to Nikolai-on Danielson: 1879-93
Marx to Dr. Kugelmann: 1868-71
Marx or Engels to Sorge: 1870-94Early Documents
Heinrich Marx to son Karl Marx: 1836-38
Certificates, etc.: 1818-41
Individual Correspondence
1830s
Marx to father in Trier. November 10, 1837 1840s
Marx to Carl Friedrich Bachman. April 6, 1841 Marx to Oscar Ludwig Bernhard Wolf. April 7, 1841 Marx to Dagobert Oppenheim. August 25, 1841 Marx To Ludwig Feuerbach. Oct 3, 1843 Marx To Julius Fröbel. Nov 21, 1843 Marx and Arnold Ruge to editor of Démocratie Pacifique. Dec 12, 1843 Marx to editor of Augsburg Allegemeine Zeitung. Apr 14, 1844 Marx to Heinrich Bornstein. Dec 30, 1844 Marx to Heinrich Heine. Feb 02, 1845 Engels to the Communist Correspondence Committee. Sep 19, 1846 Engels to the Communist Correspondence Committee. Oct 23, 1846 Marx to Pavel Annenkov. Dec 28, 1846
Source: The letters in this archive come from a variety of sources. Selected Correspondence 1846-1895 with Commentary and Notes. Marx and Engels, Lawrence & Wishart, London 1934; Letter to Americans, Progress Publishers, Science and Society, 1938, Letters on Capital, New Park Publications, Marx Engels Correspondence International Publishers, 1968; Selected Correspondence. Marx and Engels, International Publishers, London 1975; Marx and Engels on the Trade Unions. Edited with an introduction and notes by Kenneth Lapides; Marx & Engels on Ireland and the Irish Question, Progress Press. Many of these were transcribed by Sally Ryan. Most of the remaining letters have been transcribed from MECW, Volumes 38 to 50, by Andy Blunden, 2000-2002.