Duh! It's a legal phrase meaning 'THIS document' with it's conditions/stipulations. After this sentence came PROPOSED Amendments.
If not for partial quotes, misquotes, and quotes out of context you southron types would have no quotes at all. The passage reads, "We the said Delegates in the name and in behalf of the People of Virginia do by these presents assent to and ratify the Constitution recommended on the seventeenth day of September one thousand seven hundred and eighty seven by the Federal Convention for the Government of the United States hereby announcing to all those whom it may concern that the said Constitution is binding upon the said People according to an authentic Copy hereto annexed..."
They assent to and ratify the Constitution recommended by the convention, period. They announced to all that the Constitution was binding upon said people of Virginia. And nowhere in the Constitution does it allow that "the powers granted under the Constitution being derived from the People of the United States may be resumed by them..." Period.