These four volumes do more to explain the depth and extent of the Indian Nations that existed in the Northwest prior to the fur traders. A vast empire headquartered in present day central Oregon, near the major Indian trading centers on the Columbia River with influences extending east into present day Wyoming, south to Santa Fe, NM and Indio, CA. This series of books is perhaps the only written account of the Shoshone Indians. An Indian nation that witnessed and bore the brunt of the indiscretions of fur traders, explorers, gold hunters, religious pioneers, settlers, and others.