U.S. - Canada boundary or relations

Undivided back, looks to be a U.S. card addressed to David Merrill, Chester Depot, Vermont, care of Aunt Emily from A.W. Davis. Dated June 15, 1908. Shows a boundary marker. The "Treaty of Washington" refers to the Webster-Ashburton Treaty of 1842 (as far as I can tell) and this would therefore be somewhere along the border of Maine with what is now Canada, as that contentious issue was what the Treaty settled.

"This bridge divides Canada from the United States of America. It was this bridge that caused the Battle of Lundy Lane to be fought between USA & Great Britain. The Americans retiring after the battle. A monument is erected close by in Lundy Lane cemetery in rememberance [sic] of the men who fell in the battle." (written across entire back). This card is Valentine & Sons no. 108,052.

The Roosevelt family's summer home at Campobello Island, New Brunswick. Artvue Post Card Co., 225 Fifth Ave., New York, N.Y. Unused.

Postmarked at New Bedford, Mass., August 26, 1937 to Mrs A. T. Bates, 412 Washington St., Whitman, Mass., with a short letter. Numbered 113702.

Mailed October 1, 1902 at Niagara Falls, N.Y. to an address in Austria. Interesting looking receiver cancels.