The Missouri compromise line of 1820 was very aggressive; it declared that slavery was abolished forever throughout a country reaching from the Mississippi river to the Pacific ocean, stretching over thirty-two degrees of longitude, and twelve and a half degrees of latitude on its eastern side, sweeping over four-fifths, to say no more, of the original province of Louisiana. That the United States Government stipulated in favor of the inhabitants to the extent here contended for, has not been seriously denied, as far as I know; but the argument is, that Congress had authority to _repeal_ the third article of the treaty of 1803, in so far as it secured the right to hold slave property, in a portion of the ceded territory, leaving the right to exist in other parts. In other words, that Congress could repeal the third article entirely, at its pleasure. This I deny. The compacts with North Carolina and Georgia were treaties also, and stood on the same footing of the Louisiana treaty; on the assumption of power to repeal the one, it must have extended to all, and Congress could have excluded the slaveholder of North Carolina from the enjoyment of his lands in the Territory now the State of Tennessee, where the citizens of the mother State were the principal proprietors. And so in the case of Georgia. Her citizens could have been refused the right to emigrate to the Mississippi or Alabama Territory, unless they left their most valuable and cherished property behind them. The Constitution was framed in reference to facts then existing or likely to arise: the instrument looked to no theories of Government. In the vigorous debates in the Convention, as reported by Mr. Madison and others, surrounding facts, and the condition and necessities of the country, gave rise to almost every provision; and among those facts, it was prominently true, that Congress dare not be intrusted with power to provide that, if North Carolina or Georgia ceded her western territory, the citizens of the State (in either case) could be prohibited, at the pleasure of Congress, from removing to their lands, then granted to a large extent, in the country likely to be ceded, unless they left their slaves behind. That such an attempt, in the face of a population fresh from the war of the Revolution, and then engaged in war with the great confederacy of Indians, extending from the mouth of the Ohio to the Gulf of Mexico, would end in open revolt, all intelligent men knew.