In _Mississippi_ the State Rights Convention was held June 16th, at Jackson. Resolutions were passed reaffirming the policy indicated by the Convention of October, 1849, which was in the main as follows: A devoted and cherished attachment to the Constitution, "as it was formed and not as an engine of oppression," was expressed. The institution of slavery was declared to be exclusively under the control of the States in which it exists; and "all attempts on the part of Congress or others to interfere with this subject, either directly or indirectly, are in violation of the Constitution, dangerous to the rights and safety of the South, and ought to be promptly resisted." The right of Congress to abolish slavery in the District of Columbia, to prohibit the slave-trade between the several States, or to prohibit the introduction of slavery into the Territories of the United States is denied. The Wilmot Proviso is declared to be "an unjust and insulting discrimination, to which these States can not without degradation submit." The Legislature is requested to pass laws to encourage emigration of citizens of the slave-holding States into the new Territories. The resolutions of the Nashville Convention of 1850 are sanctioned and approved. The Convention declare the admission of California into the Union to be the "enactment of the Wilmot Proviso in another form," as set forth in a letter from the Congressional delegation of the State, under date of June 21, 1850. The Compromise measures are disavowed, particularly the admission of California, the division of Texas, the action on the subject of the slave-trade in the District of Columbia; and the course of the southern members of Congress who voted for those measures is most warmly condemned. While the "right of a State peaceably to withdraw from the Union, without denial or obstruction," is affirmed, the Convention "consider it the last remedy, the final alternative, and also declare that the exercise of it by the State of Mississippi, under existing circumstances, would be inexpedient, and is a proposition which does not meet the approbation of this Convention." The platform of the Union party, as adopted by common consent, declares "The American Union secondary in importance only to the rights and principles it was designed to perpetuate." It is represented that in the spirit of compromise which enabled the original thirteen States to found the Union, and which the present thirty-one must exercise to perpetuate it, they have considered the whole series of the Compromise measures, "and while they do not wholly approve, they will abide by it as a permanent adjustment of this sectional controversy." It is declared that, as a last resort, Mississippi ought to resist to the disruption of the Union any action by Congress upon the subject of slavery in the District of Columbia or in places subject to the jurisdiction of Congress which should be inconsistent with the safety or honor of the Slaveholding