INTRODUCTION. Xi 
discoverer (Vancouver Island), the Straits that 
of the old sailor (Juan de Fuca). 
By the treaty of Washington, the 49th pl. of 
lat. N. was to be the recognised Boundary Line, 
the course through the sea to be the centre of 
the Gulf of Georgia, and thence southward 
through the Channel which separates the con- 
tinent from Vancouver Island, to the Straits of 
Juan de Fuca. 
The duties of our Commission were to mark 
the Boundary line from the coast to the eastern 
slope of the Rocky Mountains. 
May 1866. 
