Chapter 7, Footnote #03
Who helped on the Logic?
The only person from whom I received any direct assistance in the preparation of the ``System of Logic'' was Mr. Bain, since so justly celebrated for his philosophical writings. He went carefully through the manuscript before it was sent to press, and enriched it with a great number of additional examples and illustrations from science; many of which, as well as some detached remarks of his own in confirmation of may logical views, I inserted nearly in his own words.
My obligations to Comte were only to his writings---to the part which had then been published of his ``Système de Philosophie Positive'': and, as has been seen from what I have said in the Narrative, the amount of these obligations is far less than has sometimes been asserted. The first volume, which contains al the fundamental doctrines of the book, was substantially complete before I had seen Comte's treatise. I derived from him many valuable thoughts, compicuously in the chapter on Hypotheses and in the view taken of the logic of algebra: but it is only in the concluding Book, on the Logic of the Moral Sciences that I owe to him any radical improvement in my conception of the application of logical methods. This improvement I have stated and characterized in a former part of the present Memoir.