When driven from every other argument, gentlemen of the South threaten, that if the 'Proviso' or a law prohibiting slavery in free territory, is passed, they will dissolve the Union. At the North, the dissolution of the Union is not regarded as among possible events. Its value is never calculated. It has been cemented by too many common and glorious sacrifices and struggles; it is protected by too many pious invocations of its magnanimous founders, to be easily severed. The cause by which these fraternal bonds are sundered must be other than a refusal on the part of the free States to allow the Government to establish slavery in free territory. A submission to the will of the majority is a fundamental principle of our institutions. If the North are overborne in this contest, they must and will submit. If the demands of the South are denied by the decision of the majority, a like cheerful and ready acquiesence is expected. Until, however, the majority have decided, no legal and constitutional efforts to exclude slavery from these Territories will be abated by passionate threats against the peace and perpetuity of the Union. The Union would never have been formed had the present demand of the slave States been made and insisted upon. A proposition in the Constitutional Convention to make the Government a propagandist of slavery in free territory, would have been indignantly rejected. Whilst we stand here, upon the floor of the American Congress, at the noon of the nineteenth century, gravely discussing whether or not we will extend and perpetuate slavery, the monarchical governments of Europe are striking off shackles and 'letting the oppressed go free.' Slavery has been abolished by the French colonies. Portugal, Spain, and Russia, are moving in the work of emancipation. Within a few years England has given liberty to eight hundred thousand slaves. She has expended, within the last forty years, one hundred millions of dollars in suppressing the slave trade. Is it reserved for the Government of 'free, happy America,' in the midst of examples like these, to be fastening corroding chains upon human beings? Sooner than be involved in such stupendous guilt, let our name and existence perish among the nations.