There is now in this country but one party that promises, in good faith, to put in practice the principles of Washington, Jefferson, Madison, and the other venerable Fathers of the Republic--the Republican party. To this party we pledge unswerving allegiance, so long as it shall continue to pursue the statism advocated by the great political prototypes above-mentioned, but no longer. We believe it is, as it ought to be, the desire, the determination, and the destiny of this party, to give the death-blow to slavery; should future developments prove the party at variance with this belief--a belief, by the bye, which it has recently inspired in the breasts of little less than one and a half millions of the most intelligent and patriotic voters in America--we shall shake off the dust of our feet against it, and join one that will, in a summary manner, extirpate the intolerable grievance. CHAPTER IV. NORTHERN TESTIMONY. The best evidence that can be given of the enlightened patriotism and love of liberty in the Free States, is the fact that, at the Presidential election in 1856, they polled thirteen hundred thousand votes for the Republican candidate, JOHN C. FREMONT. This fact of itself seems to preclude the necessity of strengthening our cause with the individual testimony of even their greatest men. Having, however, adduced the most cogent and conclusive anti-slavery arguments from the Washingtons, the Jeffersons, the Madisons, the Randolphs, and the Clays of the South, we shall now proceed to enrich our pages with gems of Liberty from the Franklins, the Hamiltons, the Jays, the Adamses, and the Websters of the North. Too close attention cannot be paid to the words of wisdom which we have extracted from the works of these truly eminent and philosophic Statesmen. We will first listen to THE VOICE OF FRANKLIN. Dr. Franklin was the first president of "The Pennsylvania Society for promoting the Abolition of Slavery;" and it is now generally conceded that this was the first regularly organized American abolition Society--it having been formed as early as 1774, while we were yet subjects of the British government. In 1790, in the name and on behalf of this Society, Dr. Franklin, who was then within a few months of the close of his life, drafted a memorial "to the Senate and House of Representatives of the United States," in which he said:--