It was this Congress that accepted the cession from Virginia. They had no power to accept it under the Articles of Confederation. But they had an undoubted right, as independent sovereignties, to accept any cession of territory for their common benefit, which all of them assented to; and it is equally clear, that as their common property, and having no superior to control them, they had the right to exercise absolute dominion over it, subject only to the restrictions which Virginia had imposed in her act of cession. There was, as we have said, no Government of the United States then in existence with special enumerated and limited powers. The territory belonged to sovereignties, who, subject to the limitations above mentioned, had a right to establish any form of government they pleased, by compact or treaty among themselves, and to regulate rights of person and rights of property in the territory, as they might deem proper. It was by a Congress, representing the authority of these several and separate sovereignties, and acting under their authority and command, (but not from any authority derived from the Articles of Confederation,) that the instrument usually called the ordinance of 1787 was adopted; regulating in much detail the principles and the laws by which this territory should be governed; and among other provisions, slavery is prohibited in it. We do not question the power of the States, by agreement among themselves, to pass this ordinance, nor its obligatory force in the territory, while the confederation or league of the States in their separate sovereign character continued to exist.