Colorado.

Map shows railroads, Native American reservations, cities, towns, post offices, and notable physical features. Relief shown by hachures. Scale [ca. 1:3,379,000] and [ca. 1:4,771,000].
Date: [1900..1920]
Creator: C.S. Hammond & Company
System: The Portal to Texas History

New Mexico.

Map shows early twentieth century New Mexico railroads, cities, towns, continental divide, and notable physical features. Relief shown by hachures. Scale [ca. 1:4,771,000].
Date: [1900..1920]
Creator: C.S. Hammond & Company
System: The Portal to Texas History

Map of Gila and Salt River Valleys showing existing and proposed irrigation works.

Map shows existing and proposed irrigation works and canals, township grid, existing towns, Indian reservations, railroads, roads, and mining activity for Maricopa County and parts of Pinal, Yavapai, and Gila Counties in Arizona during the late-nineteenth to early-twentieth centuries. Relief shown by hachures. Scale not given.
Date: 1900
Creator: Graham, Andrew B.
System: The Portal to Texas History

Map of Texas and parts of adjoining territories.

Map shows early twentieth century Texas geography and place names. Relief shown by contours. Scale [1:1,584,000].
Date: 1900
Creator: Hill, Robert Thomas, 1858-1941
System: The Portal to Texas History