It is very true, that in that portion of the Union where the labor of the negro race was found to be unsuited to the climate and unprofitable to the master, but few slaves were held at the time of the Declaration of Independence; and when the Constitution was adopted, it had entirely worn out in one of them, and measures had been taken for its gradual abolition in several others. But this change had not been produced by any change of opinion in relation to this race; but because it was discovered, from experience, that slave labor was unsuited to the climate and productions of these States: for some of the States, where it had ceased or nearly ceased to exist, were actively engaged in the slave trade, procuring cargoes on the coast of Africa, and transporting them for sale to those parts of the Union where their labor was found to be profitable, and suited to the climate and productions. And this traffic was openly carried on, and fortunes accumulated by it, without reproach from the people of the States where they resided. And it can hardly be supposed that, in the States where it was then countenanced in its worst form--that is, in the seizure and transportation--the people could have regarded those who were emancipated as entitled to equal rights with themselves. And we may here again refer, in support of this proposition, to the plain and unequivocal language of the laws of the several States, some passed after the Declaration of Independence and before the Constitution was adopted, and some since the Government went into operation. We need not refer, on this point, particularly to the laws of the present slaveholding States. Their statute books are full of provisions in relation to this class, in the same spirit with the Maryland law which we have before quoted. They have continued to treat them as an inferior class, and to subject them to strict police regulations, drawing a broad line of distinction between the citizen and the slave races, and legislating in relation to them upon the same principle which prevailed at the time of the Declaration of Independence. As relates to these States, it is too plain for argument, that they have never been regarded as a part of the people or citizens of the State, nor supposed to possess any political rights which the dominant race might not withhold or grant at their pleasure. And as long ago as 1822, the Court of Appeals of Kentucky decided that free negroes and mulattoes were not citizens within the meaning of the Constitution of the United States; and the correctness of this decision is recognised, and the same doctrine affirmed, in 1 Meigs's Tenn. Reports, 331. And if we turn to the legislation of the States where slavery had worn out, or measures taken for its speedy abolition, we shall find the same opinions and principles equally fixed and equally acted upon.