Thanks for visiting NCpedia and posting back with this additional information about Washington's Southern Tour.
I have added the NC Highway Historical Marker essay that you note, courtesy of the North Carolina Department of Cultural Resources, to NCpedia. You can read the entry at: http://ncpedia.org/washingtons-southern-tour-last-NC-stop
Thanks very much for letting us know so we can share this new resource with NCpedia readers!
Kelly Agan, Government & Heritage Library