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ROM this time, what is worth relating of my life will come into a very small compass; for I have no further mental changes to tell of, but only, as I hope, a continued mental progress; which does not admit of a consecutive history, and the results of which, if real, will be best found in my writings. I shall, therefore, greatly abridge the chronicle of my subsequent years.

The first use I made of the leisure which I gained by disconnecting myself from the Review, was to finish the Logic. In July and August 1838, I had found an interval in which to execute what was still undone of the original draft of the Third Book. In working out the logical theory of those laws of nature which are not laws of Causation, nor corollaries from such laws, I was led to recognise kinds as realities in nature, and not mere distinctions for convenience; a light which I had not obtained when the First Book was written, and which made it necessary for me to modify and enlarge several chapters of that Book. The Book on Language and Classification,