Map showing the line of boundary between the United States & British Possessions [i.e. Canada] from the point where the 49th Parallel ... strikes the Western Coast ... to Fuca's Straits in accordance with Treaty of June 15th, 1846 / 
Bowen and Company.
Whiteman & Bass.
London :  Cassell, Petter & Galpin, 
[1869]
In: A history of the San Juan Water Boundary Question ... By Viscount Milton.