Originally intended as a general introduction to A Contribution to Critique of Political Economy, Marx decided against it for the much shorter (and more often quoted) "Preface".
It was found among Marx's papers (dated August 23 1857) after his death and published by Karl Kautsky in Neue Zeit, March 1903. First English edition was Chicago 1904 by N. I. Stone (published along with the Critique).
ONLINE VERSION: Translated from German by S. W. Ryazanskaya and published by Progress Publishers. Transcribed for the Internet by firstname.lastname@example.org in May 1993.