Colorado historical gold maps
1859, Map of the United States west of the Mississippi showing the routes to Pike’s Peak, overland mail route to California and Pacific rail road surveys
1862, Map of Colorado Territory embracing the Central Gold Region
1881, Map of the Denver & Rio Grande Railway, showing its connections and extensions also the relative position of Denver and Pueblo to all the principal towns and mining regions of Colorado and New Mexico.
1884, Map of Pitkin County, Colorado
1888, Map of Pueblo County, Colorado
1893, Map of Southwestern Colorado
