Our history proves that the fathers of the Republic, in advance of all other nations, condemned the African slave trade. It was, notwithstanding, deemed expedient by the framers of the Constitution to deprive Congress of the power to prohibit "the migration or importation of such persons as any of the States now existing shall think proper to admit" "prior to the year 1808." It will be seen that this restriction on the power of Congress was confined to such States only as might think proper to admit the importation of slaves. It did not extend to other States or to the trade carried on abroad. Accordingly, we find that so early as the 22d March, 1794, Congress passed an act imposing severe penalties and punishments upon citizens and residents of the United States who should engage in this trade between foreign nations. The provisions of this act were extended and enforced by the act of 10th May, 1800. Again, the States themselves had a clear right to waive the constitutional privilege intended for their benefit, and to prohibit by their own laws this trade at any time they thought proper previous to 1808. Several of them exercised this right before that period, and among them some containing the greatest number of slaves. This gave to Congress the immediate power to act in regard to all such States, because they themselves had removed the constitutional barrier. Congress accordingly passed an act on 28th February, 1803, "to prevent the importation of certain persons into certain States where by the laws thereof their admission is prohibited." In this manner the importation of African slaves into the United States was to a great extent prohibited some years in advance of 1808. As the year 1808 approached Congress determined not to suffer this trade to exist even for a single day after they had the power to abolish it. On the 2d of March, 1807, they passed an act, to take effect "from and after the 1st day of January, 1808," prohibiting the importation of African slaves into the United States. This was followed by subsequent acts of a similar character, to which I need not specially refer. Such were the principles and such the practice of our ancestors more than fifty years ago in regard to the African slave trade. It did not occur to the revered patriots who had been delegates to the Convention, and afterwards became members of Congress, that in passing these laws they had violated the Constitution which they had framed with so much care and deliberation. They supposed that to prohibit Congress in express terms from exercising a specified power before an appointed day necessarily involved the right to exercise this power after that day had arrived.