P. S. _September_ 27, 1854.--It is suggested to me by a friend, that in this special notice of Mr. Buchanan's edition, I shall be interpreted as having designed some covert reflection upon the edition of Adam Smith published by Mr. M'Culloch. My summary answer to any such insinuation is, that this whole paper was written in the spring of 1824, that is, thirty and a half years ago: at which time, to the best of my knowledge, Mr. M'Culloch had not so much as meditated any such edition. Let me add, that if I had seen or fancied any reason for a criticism unfriendly to Mr. M'Culloch, or to any writer whatever, I should not have offered it indirectly, but openly, frankly, and in the spirit of liberal candor due to an honorable contemporary.] At this very day, a French and an English economist have reared a Babel of far more elaborate errors on this subject; M. Say, I mean, and Mr. Malthus: both ingenious writers, both eminently illogical,--especially the latter, with whose "confusion worse confounded" on the subject of Value, if reviewed by some unsparing Rhadamanthus of logical justice, I believe that chaos would appear a model of order and light. Yet the very want of logic, which has betrayed these two writers into so many errors, has befriended them in escaping from their consequences; for they leap with the utmost agility over all obstacles to any conclusions which their good sense points out to them as just, however much at war with their own premises. With respect to the confusion which you complain of as still clinging to the subject, this naturally attends the first efforts of the mind to disjoin two ideas which have constantly been regarded as one. But, as we advance in our discussions, illustration and proof will gradually arise from all quarters, to the great principle of Mr. Ricardo which we have just been considering; besides which, this principle is itself so much required for the illustration and proof of other principles, that the mere practice of applying it will soon sharpen your eye to a steady familiarity with all its aspects. * * * * * DIALOGUE THE SECOND. REDUCTIO AD ABSURDUM. _Phil_. X., I see, is not yet come: I hope he does not mean to break his appointment, for I have a design upon him. I have been considering his argument against the possibility of any change in price arising out of a change in the value of labor, and I have detected a flaw in it which he can never get over. I have him, sir--I have him as fast as ever spider had a fly.