part of Political Economy, which Mr. Ricardo did not. The course of my studies has led me to cultivate the scholastic logic. Mr. Ricardo has obviously neglected it. Confiding in his own conscious strength, and no doubt participating in the common error of modern times as to the value of artificial logic, he has taken for granted that the Aristotelian forms and the exquisite science of distinctions matured by the subtilty of the schoolmen can achieve nothing in substance which is beyond the power of mere sound good sense and robust faculties of reasoning; or at most can only attain the same end with a little more speed and adroitness. But this is a great error: and it was an ill day for the human understanding when Lord Bacon gave his countenance to a notion, which his own exclusive study of one department in philosophy could alone have suggested. Distinctions previously examined--probed--and accurately bounded, together with a terminology previously established, are the crutches on which all minds--the weakest and the strongest--must alike depend in many cases of perplexity: from pure neglect of such aids, which are to the unassisted understanding what weapons are to the unarmed human strength or tools and machinery to the naked hand of art, do many branches of knowledge at this day languish amongst those which are independent of experiment. [Footnote 31: MR. J. R. MCCULLOCH in his _Literature of Political Economy_ makes the following observations concerning DE QUINCEY'S 'Dialogues of Three Templars on Political Economy':--They are unequalled, perhaps, for brevity, pungency, and force. They not only bring the Ricardian theory of value into strong relief, but triumphantly repel, or rather annihilate, the objections urged against it by Malthus, in the pamphlet now referred to and his Political Economy, and by Say, and others. They may, indeed, be said to have exhausted the subject.] [Footnote 32: Not so however, let me say in passing, for three supposed instances of affected doubt; in all of which my doubts were, and are at this moment, very sincere and unaffected; and, in one of them at least, I am assured by those of whom I have since inquired that my reviewer is undoubtedly mistaken. As another point which, if left unnoticed, might affect something more important to myself than the credit of my taste or judgment,--let me inform my reviewer that, when he traces an incident which I have recorded most faithfully about a Malay--to a tale of Mr. Hogg's, he makes me indebted to a book which I never saw. In saying this I mean no disrespect to Mr. Hogg; on the contrary, I am sorry that I have never seen it: for I have a great admiration of Mr. Hogg's genius; and have had the honour of his personal acquaintance for the last ten years.]