Of these Essays, which were written in 1829 and 1830, the fifth alone has been previously printed. The other four have hitherto remained in manuscript, because, during the temporary suspension of public interest in the species of discussion to which they belong, there was no inducement to their publication.They are now published (with a few merely verbal alterations) under the impression that the controversies excited by Colonel Torrens’ Budget have again called the attention of political economists to the discussions of the abstract science: and from the additional consideration, that the first paper relates expressly to the point upon which the question at issue between Colonel Torrens and his antagonists has principally turned…. [From the Preface to the First Edition.]