Map shows major physical features, areas of Native American habitation, major cities and towns; northern portion of map is labeled Oregon Territory, Missouri Territory, southern portion is Upper California and New Mexico; February 1848 treaty boundary line between Mexico and the United States. Includes notes and "explanations." Inset: "Profile of the travelling route from the South Pass of the the Rocky Mountains to the Bay of San Francisco." Relief shown by hachures and spot heights. Scale [ca. 1:3,000,000].

Map shows highlighted railroad routes between Shreveport and Texarkana across north central Texas, southern New Mexico, Arizona, and California to San Diego; American flag pinpoints locations along the route; roads, routes of military expeditions, military posts, Indian villages, mining activity, and notable physical features. Includes "Southern boundary of New Mexico by A.B. Gray U.S. Surveyor about 8 miles above El Paso." Relief shown by hachures. Scale [ca. 1:1,000,000].