 Complete the following phrase:  The Bitterroot Valley is the ancestral homeland of the Bitterroot Salish people. Between 1812 and 1821, the Salish learned about the powerful medicine of Christianity and Jesuit missionaries from Iroquois fur traders. In 1831, four young Salish men were dispatched to St. Louis, Missouri, to request Black Robes for the tribe. The four Salish men were directed to the home and office of William Clark of 