Mr. J. Roy set himself the task of producing a version that would be as exact and even literal as possible, and has scrupulously fulfilled it. But his very scrupulosity has compelled me to modify his text, with a view to rendering it more intelligible to the reader. These alterations, introduced from day to day, as the book was published in parts, were not made with equal care and were bound to result in a lack of harmony in style. Having once undertaken this work of revision, I was led to apply it also to the basic original text (the second German edition), to simplify some arguments, to complete others, to give additional historical or statistical material, to add critical suggestions, etc. Hence, whatever the literary defects of this French edition may be, it possesses a scientific value independent of the original and should be consulted even by readers familiar with German. Below I give the passages in the Afterword to the second German edition which treat of the development of Political Economy in Germany and the method employed in the present work.
Economic Manuscripts: Capital Vol. I - 1875 Afterword