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distinguished, and specially identified. Over and above the general influence which her mind had over mine, the most valuable ideas and features in these joint productions—those which have been most fruitful of important results, and have contributed most to the success and reputation of the works themselves—originated with her, were emanations from her mind, my part in them being no greater than in any of the thoughts which I found in previous writers, and made my own only by incorporating them with my own system of thought. During the greater part of my literary life I have performed the office in relation to her, which from a rather early period I had considered as the most useful part that I was qualified to take in the domain of thought, that of an interpreter of original thinkers, and mediator between them and the public; for I had always a humble opinion of my own powers as an original thinker, except in abstract science (logic, metaphysics, and the theoretic principles of political economy and politics), but thought myself much superior to most of my contemporaries in willingness and ability to learn from everybody; as I found hardly any one who made such a point of examining what was said in defence of all opinions, however new or however old, in the conviction that even if they were errors there might be a substratum of truth underneath them, and that in any case the