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Return to:   Alaska-Canada Boundary Dispute - Alaska and Canada's shared boundary, the longest undefended border in the world, was first established with the Anglo-Russian Treaty of 1825.
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Transit and heliograph at a main projection point

Writer sending message to members of party 20 miles distant. From a portion of the Asa Baldwin collection documenting the Alaska-Canada boundary survey from 1910 to 1913. Alaska State Library - Historical Collections.

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