Map shows major physical features, areas of Native American habitation, major cities, and towns. Northern portion of map is labeled "Oregon Territory" and "Missouri Territory." Southern portion is "Upper California and New Mexico" with the "February 1848 Treaty Boundary Line between Mexico and the United States." Notes and "explanations" are included. Inset: "Profile of the Traveling Route from the South Pass of the Rocky Mountains to the Bay of San Francisco." Relief shown by hachures and spot heights, and by profile. Scale [1:3,000,000].
Map shows Russian Possessions, treat boundaries between United States and Spanish Possessions (1819) and British Possessions (1818), physical landmarks, "wagon road to Santa Fe," major settlements and forts. Includes image and note: "Facsimile of a Medal struck at Boston in 1787 on occasion of the departure of the vessels Columbia and Washington for the North West Coast of America...." Inset: The North Pacific Ocean and the adjacent coasts and islands. Relief shown by hachures. Scale not given.