DEAR SIR,--Your favor of February 14th has been duly received, and the MS. of the commentary on Montesquieu is also safe at hand. I now forward to you the work of Tracy, which you will find a valuable supplement and corrective to those we already possess on political economy. It is a little unlucky that its outset is of a metaphysical character, which may damp the ardor of perusal in some readers. He has been led to this by a desire to embody this work, as well as a future one he is preparing on morals, with his former treatise on Ideology. By-the-bye, it is merely to this work that Bonaparte alludes in his answer to his Council of State, published not long since, in which he scouts "the dark and metaphysical doctrine of Ideology, which, diving into first causes, founds on this basis a legislation of the people, &c." If, indeed, this answer be not a forgery, for everything is now forged, even to the fat of our beef and mutton: yet the speech is not unlike him, and affords scope for an excellent parody. I wish you may succeed in getting the commentary on Montesquieu reviewed by the Edinburgh Reviewers. I should expect from them an able and favorable analysis of it. I sent a copy of it to a friend in England, in the hope he would communicate it to them; not, however, expressing that hope, lest the source of it should have been made known. But the book will make its way, and will become a standard work. A copy which I sent to France was under translation by one of the ablest men of that country. It is true that I am tired of practical politics, and happier while reading the history of ancient than of modern times. The total banishment of all moral principle from the code which governs the intercourse of nations, the melancholy reflection that after the mean, wicked and cowardly cunning of the cabinets of the age of Machiavel had given place to the integrity and good faith which dignified the succeeding one of a Chatham and Turgot, that this is to be swept away again by the daring profligacy and avowed destitution of all moral principle of a Cartouche and a Blackbeard, sickens my soul unto death. I turn from the contemplation with loathing, and take refuge in the histories of other times, where, if they also furnished their Tarquins, their Catalines and Caligulas, their stories are handed to us under the brand of a Livy, a Sallust and a Tacitus, and we are comforted with the reflection that the condemnation of all succeeding generations has confirmed the censures of the historian, and consigned their memories to everlasting infamy, a solace we cannot have with the Georges and Napoleons but by anticipation.