New discoveries of one season explained things not understood in previous explorations, so to gather up missing links and further elucidate the whole region, especially the people of the small section near Vancouver, it was necessary to take up some new territory and thoroughly explore it. Smith, therefore, went into the Yakima River Valley in northern Washington in 1903. On the map, this section does not look far from the Thompson River district in British Columbia, but Smith found not only their culture, but their skulls were different.