In 1840 he made a more distinct and powerful impression than ever before, by the publication of _The Crisis of the Country, American Jacobinism_, and _One Presidential Term_, a series of tracts under the name of "Junius," which were circulated in all the states by thousands and hundreds of thousands, and were supposed to have had great influence in the overthrow of the democratic administration. In 1842 he edited at Washington a paper called _The True Whig_, and in 1843 and 1844 he brought out a second series, embracing ten publications, still more popular than the first, of the _Junius Tracts_. In the autumn of the latter year, when the fortunes of the whig party seemed to be entirely broken, when full half the nation felt a personal grief for the defeat of a leader, added to the mortification of political discomfiture, Mr. Colton determined to write the life of the chief he had followed with unwavering admiration and unfaltering activity. Casting aside all other cares, so that his every thought might be given to the work until its completion, he set out for Kentucky, where he was sure of the friendly assistance of Mr. Clay in whatever concerned the investigation of facts. In November, 1844, he reached Lexington, where Mr. Clay laid open to him the stores of his correspondence, and the documentary history of his career. The work was finished in the spring of 1846, and published in two large octavos; and so great was the demand for it, that the first impression of five thousand copies was sold in six months. It is unquestionably an able performance, and from the circumstances under which it was composed and the conclusiveness of some of its arguments it is probable that it will always be regarded as a valuable portion of the material for contemporary political history; but, it appears to me very unequal in execution, and signally unfortunate in design, if considered either as a biography or a history. For the subjective rather than the chronological arrangement of the facts in it there is however this defence, that it rendered the work much more easy of citation, and therefore more valuable as a magazine for partisan controversy. The influence it obtained may be illustrated by reference to a single point: for a quarter of a century the staple of declamation against Mr. Clay, the opposition which thrice cost him the presidency, was his supposed bargain with John Quincy Adams; but since the appearance of Mr. Colton's exposition of this subject any person in an intelligent society would forfeit the consideration given to a gentleman who should repeat the charge.