Webster-Ashburton Treaty
"FRIENDSHIP BETWEEN THE UNITED STATES AND CANADA WAS DEVELOPED AND STRENGTHENED BY THE SIGNING OF THE WEBSTER-ASHBURTON TREATY, ON AUGUST 9, 1842, IN THE OLD STATE DEPARTMENT BUILDING WHICH STOOD ON THIS SITE. THIS TREATY ESTABLISHED THE NORTH-EASTERN BOUNDARY BETWEEN THE TWO COUNTRIES.
THIS TABLET PLACED BY THE KIWANIS CLUB OF WASHINGTON IN COOPERATION WITH THE COMMITTEE ON MARKING HISTORIC POINTS OF INTEREST
APRIL 30, 1929"
(More info at https://en.wikipedia.org/wiki/Webster%E2%80%93Ashburton_Treaty. Also, what I wouldn't give to be on the "Committee on Marking Points of Historic Interest"!)
SUBMITTED BY YoBigC