Continental Divide

And note this. The Nez Perces, like the Walla Wallas, lived in a country that lay outside the boundary of the United States. They were probably Spanish Indians, though no one could be wholly sure, and there was a possibility that they might soon become British Indians. That possibility would tum on the event and could be prevented – but assuredly they were not American Indians unless Robert Gray and Lewis and Clark had made them so. And Lewis and Clark told both tribes that the American trade would soon be with them, coming over the Continental Divide, the boundary of the United States.