Theorien über den Mehrwert
Volumes II and III of "Das Kapital" remained mere manuscripts upon which Marx continued to work for the rest of his life. Both volumes were published by Engels after Marx's death. Volume II of "Das Kapital" was prepared and published by Engels in July 1893 under the name "Capital II: The Process of Circulation of Capital". Volume III of "Das Kapital" was published a year later in October 1894 under the name "Capital III: The Process of Capitalist Production as a Whole". "Theories of Surplus Value" derived from the sprawling "Economic Manuscripts of 1861–1863", a "second" draft for "Das Kapital", the latter spanning volumes 30–34 of the "Collected Works of Marx and Engels". Specifically, "Theories of Surplus Value" runs from the latter part of the "Collected Works' " thirtieth volume through the end of their thirty-second volume; meanwhile, the larger "Economic Manuscripts of 1861–1863" run from the start of the "Collected Works' " thirtieth volume through the first half of their thirty-fourth volume. The latter half of the Collected Works' thirty-fourth volume consists of the surviving fragments of the "Economic Manuscripts of 1863–1864", which represented a "third" draft for "Das Kapital", and a large portion of which is included as an appendix to the Penguin edition of "Das Kapital", volume I. A German-language abridged edition of "Theories of Surplus Value" was published in 1905 and in 1910. This abridged edition was translated into English and published in 1951 in London, but the complete unabridged edition of "Theories of Surplus Value" was published as the "fourth volume" of "Das Kapital" in 1963 and 1971 in Moscow.