Below is a map showing details of various US and British claims, the 1831 arbitration line, and the final 1842 line set in the Treaty of Washington / Webster-Ashburton Treaty. For a summary and history of the dispute, see my page on the Boundary Dispute.
The map is entitled "Maine Boundary Controversy, 1782-1842", and was published in The American Nation: a History from Original Sources, edited by Albert Bushnell Hart (New York: Harper & Brothers, 1906), vol. 17.
Click on map to see enlarged version.
For an outline of the events and issues surrounding the border dispute from the US perspective, see the website of Prof. Steven Schoenherr's course on US Diplomatic History, "Daniel Webster and the Ashburton Treaty."
Thanks to Prof. Shoenherr for permission to link to this map.
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Last revised 12 Sep 2003