A voice from the South [electronic resource] : comprising letters from Georgia to Massachusetts, and to the Southern states : with an appendix containing an article from the Charleston Mercury on the Wilmot proviso : together with the fourth article of the Constitution, the law of Congress, the nullification law of Pennsylvania, the resolutions of ten of the free states, the resolutions of Virginia, Georgia and Alabama, and Mr. Calhoun's resolutions in the Senate of the United States.