In the very first Congress assembled under the Federal Constitution, petitions were presented, asking its interposition for the mitigation of the evils, and final abolition of the African slave-trade, and also praying it, as far as it possessed the power, to take measures for the abolition of slavery.  These petitions excited the wrath and indignation of many of the slave-holding members, yet no one thought of refusing to receive them.  They were referred to a select committee, at the instance of Mr. Madison, himself, who “entered into a critical review of the circumstances respecting the adoption of the Constitution, and the ideas upon the limitation of the powers of Congress to interfere in the regulation of the commerce of slaves, and showed that they undoubtedly were not precluded from interposing in their importation; and generally to regulate the mode in which every species of business shall be transacted.  He adverted to the western country, and the Cession of Georgia, in which Congress have certainly the power to regulate the subject of slavery; which shows that gentlemen are mistaken in supposing, that Congress cannot constitutionally interfere in the business, in any degree, whatever.  He was in favor of committing the petition, and justified the measure by repeated precedents in the proceedings of the House.”—­U.S.  Gazette, 17th Feb., 1790.

Here we find one of the earliest and ablest expounders of the Constitution, maintaining the power of Congress to “regulate the subject of slavery” in the national territories, and urging the reference of abolition petitions to a special committee.

The committee made a report; for which, after a long debate, was substituted a declaration, by the House, that Congress could not abolish the slave trade prior to the year 1808, but had a right so to regulate it as to provide for the humane treatment of the slaves on the passage; and that Congress could not interfere in the emancipation or treatment of slaves in the States.

This declaration gave entire satisfaction, and no farther abolition petitions were presented, till after the District of Columbia had been placed under the “exclusive jurisdiction” of the General Government.

You all remember, fellow citizens, the wide-spread excitement which a few years since prevailed on the subject of SUNDAY MAILS.  Instead of attempting to quiet the agitation, by outraging the rights of the petitioners, Congress referred the petitions to a committee, and made no attempt to stifle discussion.

Why, then, we ask, with such authorities and precedents before them, do the slaveholders in Congress, regardless of their oaths, strive to gag the friends of freedom, under pretence of allaying agitation?  Because conscience does make cowards of them all—­because they know the accursed system they are upholding will not bear the light—­because they fear, if these petitions are discussed, the abominations of the American slave trade, the secrets of the prison-houses in Washington and Alexandria, and the horrors of the human shambles licensed by the authority of Congress, will be exposed to the score and indignation of the civilized world.