Mackenzir’s Granp Desicn 133 controlled by the East India Company; and the Company was so jealous of its privileges that British traders on the coast were actually forced to sail under a foreign flag, and by 1800 had been driven out by Americans, who had to endure no such restrictions. The third monopoly belonged to the South Sea Com- pany. No British vessel could trade west of Cape Horn without its permission. Every British vessel on the coast had to pay toll to the South Sea Company, while foreigners were free to trade as they would. A second set of obstacles lay in the unde- termined sovereignty of the coast. The boundary with the United States between Lake Superior and the Rockies was not drawn until 1818. Though before then the territory of the Hudson’s Bay Company was recognized as British, the vague terms of the charter had to be defined, and were in fact incompatible with the treaty of peace with the United States of 1783. West of the Rockies the situation was more complex. Russia was in possession of Alaska; Spain occupied California and for centuries had