But, let us try it in a parallel case. In the earlier land legislation of the United States, it was customary, without exception, when a Territory became a State, to require that there should be a stipulation in their State constitution that the public lands sold within their borders should be exempted from taxation for five years after the sale. This, I believe, continued to be the uniform practice down to the year 1820, when the State of Missouri was admitted. She was admitted under the stipulation. If I mistake not, the next State which was admitted into the Union--but it is not important whether it was the next or not--came in without that stipulation, and they were left free to tax the public lands the moment when they were sold. Here was a principle; as much a principle as it is contended was established in the Utah and New Mexico territorial bill; but did any one suppose that it acted upon the other Territories? I believe the whole system is now abolished under the operation of general laws, and the influence of that example may have led to the change. But, until it was made by legislation, the mere fact that public lands sold in Arkansas were immediately subject to taxation, could not alter the law in regard to the public lands sold in Missouri, or in any other to where they were they were exempt. There is a case equally analogous to the very matter we are now considering--the prohibition or permission of slavery. The ordinance of 1787 prohibited slavery in the territory northwest of the Ohio. In 1790 Congress passed an act accepting the cession which the State of North Carolina had made of the western part of her territory, with the proviso, that in reference to the territory thus ceded Congress should pass no laws "tending to the emancipation of the slaves." Here was a precisely parallel case. Here was a territory in which, in 1787, slavery was prohibited. Here was a territory ceded by North Carolina, which became the territory of the United States south of the Ohio, in reference to which it was stipulated with North Carolina, that Congress should pass no laws tending to the emancipation of slaves. But I believe it never occurred to any one that the legislation of 1790 acted back upon the ordinance of 1787, or furnished a rule by which any effect could be produced upon the state of things existing under that ordinance, in the territory to which it applied.