To the Senate and House of Representatives of the United States:
In execution of the act of the present session of Congress for taking possession of Louisiana, as ceded to us by France, and for the temporary government thereof, Governor Claiborne of the Mississippi Territory, and General Wilkinson were appointed commissioners to receive possession. They proceeded with such regular troops as had been assembled at Fort Adams from the nearest posts and with some militia of the Mississippi Territory to New Orleans. To be prepared for anything unexpected which might arise out of the transaction, a respectable body of militia was ordered to be in readiness in the States of Ohio, Kentucky, and Tennessee, and a part of those of Tennessee was moved on to the Natchez. No occasion, however, arose for their services. Our commissioners, on their arrival at New Orleans, found the Province already delivered by the commissioners of Spain to that of France, who delivered it over to them on the 20th day of December, as appears by their declaratory act accompanying this. Governor Claiborne, being duly invested with the powers heretofore exercised by the governor and intendant of Louisiana, assumed the government on the same day, and for the maintenance of law and order immediately issued the proclamation and address now communicated.
On this important acquisition, so favorable to the immediate interests of our Western citizens, so auspicious to the peace and security of the nation in general, which adds to our country territories so extensive and fertile and to our citizens new brethren to partake of the blessings of freedom and self-government, I offer to Congress and our country my sincere congratulations,
Thomas Jefferson, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/204125