For TJ’s 29 Jan. 1780 instruction as governor of Virginia to Thomas Walker and Daniel Smith, see PTJ description begins Julian P. Boyd, Charles T. Cullen, John Catanzariti, Barbara B. Oberg, James P. McClure, and others, eds., The Papers of Thomas Jefferson, 1950– , 43 vols. description ends , 3:278–9. uti possidetis is the “doctrine that old administrative boundaries will become international boundaries when a political subdivision achieves independence” (Black’s Law Dictionary description begins Bryan A. Garner and others, eds., Black’s Law Dictionary, 7th ed., 1999 description ends ). Also on 29 Jan. 1780, TJ authorized George Rogers Clark (genl clarke) to construct an army post “as near the mouth of Ohio as can be found fit for fortification and within our own lines.” The resulting installation, located in present-day Kentucky, was named Fort Jefferson in TJ’s honor (PTJ description begins Julian P. Boyd, Charles T. Cullen, John Catanzariti, Barbara B. Oberg, James P. McClure, and others, eds., The Papers of Thomas Jefferson, 1950– , 43 vols. description ends , 3:273, 277n).