A wise selection was made for Vice-President. Hannibal Hamlin belonged originally to the school of Democrats who supported Jackson, and who took Silas Wright as their model. After the repeal of the Missouri Compromise he separated himself from his old associates, and proved to be a powerful factor in the formation of the Republican party. His candidacy for Governor of Maine, in 1856, broke down the Democratic party in that State, and gave a great impulse to the Republican campaign throughout the country. In strong common sense, in sagacity and sound judgment, in rugged integrity of character, Mr. Hamlin has had no superior among public men. It is generally fortunate for a political party if the nominee for Vice- President does not prove a source of weakness in the popular canvass. Mr. Hamlin proved a source of strength, and the imparted confidence and courage to the great movement against the Democratic party. In the four Presidential tickets in the field, every shade of political opinion was represented, but only two of the candidates embodied positive policies. Mr. Lincoln was in favor of prohibiting the extension of slavery by law. Mr. Breckinridge was in favor of protecting its extension by law. No issue could have been more pronounced than the one thus presented. Mr. Douglas desired to evade it, and advocated his doctrine of non-intervention which was full of contradictions, and was in any event offensive to the anti- slavery conscience. It permitted what was considered a grievous moral wrong to be upheld, if a majority of white men would vote in favor of upholding it. Mr. Bell desired to avoid the one question that was in the popular mind, and to lead the people away from every issue except the abstract one of preserving the Union. By what means the Union could be preserved against the efforts of Southern secessionists, Mr. Bell's party did not explain. The popular apprehension was that Mr. Bell would concede all they asked, and insure the preservation of the Union by yielding to the demands of the only body of men who threatened to destroy it. ELECTION OF ABRAHAM LINCOLN.