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Niagara River and Boundary between Great Britain and United States 23 (XXIII), [1817-1826] |
![]() Niagara River and Boundary between Great Britain and United States 23 (XXIII), [1817-1826] David Thompson ’s boundary survey maps prepared under Articles VI and VII of the Treaty of Ghent Reference Code: F 443-5, AO 7603 Archives of Ontario |