The Pathfinders is a historical book written by Robert Glass Cleland. It is a comprehensive account of the exploration and settlement of the American West in the 19th century. The book covers the period from the Lewis and Clark expedition to the end of the 19th century, and it focuses on the role of the pathfinders who helped open up the West to settlement.The book is divided into three parts. The first part covers the early explorers, including Lewis...