Article 4, Section 2, Clause 3
Document 14
Joseph Story, Commentaries on the Constitution 3:§§ 1805--6
1833§ 1805. This clause was introduced into the constitution solely for the benefit of the slave-holding states, to enable them to reclaim their fugitive slaves, who should have escaped into other states, where slavery was not tolerated. The want of such a provision under the confederation was felt, as a grievous inconvenience, by the slave-holding states, since in many states no aid whatsoever would be allowed to the owners; and sometimes indeed they met with open resistance. In fact, it cannot escape the attention of every intelligent reader, that many sacrifices of opinion and feeling are to be found made by the Eastern and Middle states to the peculiar interests of the south. This forms no just subject of complaint; but it should for ever repress the delusive and mischievous notion, that the south has not at all times had its full share of benefits from the Union.
§ 1806. It is obvious, that these provisions for the arrest and removal of fugitives of both classes contemplate summary ministerial proceedings, and not the ordinary course of judicial investigations, to ascertain, whether the complaint be well founded, or the claim of ownership be established beyond all legal controversy. In case of suspected crimes the guilt or innocence of the party is to be made out at his trial; and not upon the preliminary inquiry, whether he shall be delivered up. All, that would seem in such cases to be necessary, is, that there should be primâ facie evidence before the executive authority to satisfy its judgment, that there is probable cause to believe the party guilty, such as upon an ordinary warrant would justify his commitment for trial. And in the cases of fugitive slaves there would seem to be the same necessity of requiring only primâ facie proofs of ownership, without putting the party to a formal assertion of his rights by a suit at the common law. Congress appear to have acted upon this opinion; and, accordingly, in the statute upon this subject have authorized summary proceedings before a magistrate, upon which he may grant a warrant for a removal.
The Founders' Constitution
Volume 4, Article 4, Section 2, Clause 3, Document 14
http://press-pubs.uchicago.edu/founders/documents/a4_2_3s14.html
The University of Chicago Press
Story, Joseph. Commentaries on the Constitution of the United States. 3 vols. Boston, 1833.