George Rogers Clark’s expedition was of immense importance to both the United States and Canada. But for him, Canada’s border arguably would be much further south. His younger brother William, in partnership with Meriwether Lewis is perhaps better known for an adventure that gave Americans a continental vision. However, the winning of the Northwest can be laid at the door of George Rogers. This volume is but a sample of the prodigious work of Reuben Gold Thwaites (1853-1913), who enormously increased the collections of the Wisconsin Historical Society as its director, edited 73 volumes of Jesuit activity in North America, produced an eight volume set of the journals of Lewis and Clark, and wrote a cornucopia of essays about America’s expansion westward, not only producing his own titles but busily collecting documents for generations of future historians to build upon.