PART IV
1780-1793
FIRST ACROSS THE ROCKIES--HOW MACKENZIE CROSSED THE NORTHERN ROCKIES AND LEWIS AND CLARK WERE FIRST TO CROSS FROM MISSOURI TO COLUMBIA
1780-1793
FIRST ACROSS THE ROCKIES--HOW MACKENZIE CROSSED THE NORTHERN ROCKIES AND LEWIS AND CLARK WERE FIRST TO CROSS FROM MISSOURI TO COLUMBIA