Drawing by Tom Hill, called "Crossing the Plains," showing a chain of ox-drawn covered wagons, ca.1850 

Painting by Einar Corsten Petersen, depicting "American Settlers Arriving" with covered wagons drawn by oxen, [s.d.] 

Travelers and an ox-drawn wagon on the road east from Oregon, ca.1932 

Two horse-drawn wagons on the road between the Painted Desert and the San Francisco Mountains, Arizona, ca.1900 

Painting by Einar Corsten Petersen, depicting "Covered Wagons Pushing Across the Plains", [s.d.] 

Team of horses pulling a covered wagon in Scott Valley, Siskiyou County, ca.1905 

Horse-drawn wagons hauling grain to depot, ca.1920 

Conastoga wagon built by John Studebaker in 1830, ca.1900 

Drawing by H.W. Hansen, "Crossing the plains; the indians' use of firearms and firewater", depicting pioneers coming across a ravaged wagoneer, [s.d.] 

Five Navajo Indian wagons outside Hubbell's Indian Agency Store, Ganado, Arizona, ca.1870-1905 

Half-tone print of a painting by Routledge of the California, a side wheel steamer, the first American steamship to round the Horn, ca.1850 

Horse-drawn wagon driving through a tunnel in a Wawona Big Tree in Mariposa Grove in Yosemite National Park, California, ca.1902 

Three men standing on two wagons near a tank of water in Death Valley, ca.1900 

Drawing of a United States mail stagecoach in the 1850's 

"Arizona Mary" leading a sixteen-yoke ox team in Arizona, ca.1890 

Two covered wagons fording the little Colorado River beside a cable ferry, 1903 

Painting of a dying scout and his companions, by G.A. Mag(?), California, ca.1900 

Snow-covered rocks and trees in Yosemite National Park, from Artist Point, ca.1850-1930 

A.F. Harmer's painting "Giving Him a Lift" showing two vacqueros aiding a covered wagon, ca.1906 

Painting of a general view of Mission San Juan Capistrano, ca.1884