Two men and a train of pack mules in the Mojave Desert, February, 1912 

George McAnany riding a pack mule, Mojave Desert, February 1912 

Carl Eytel and Van Buskirk with pack burros on their Colorado River trip with George Wharton James, ca.1900 

Woman feeding pack mules at Dove Springs on the south road to the valley, Death Valley, ca.1900-1950 

Three pack burros used in mining, California, ca.1900 

A packer on a saddle donkey leading a pack of five donkeys with a man on foot bringing up the rear, 1900 

Half Dome and Yosemite Valley from the river, Yosemite National Park, 1900-1930 

Paiute Indian woman basket maker of Yosemite Valley, ca.1900 

Pack mule and man enroute to mine, Mount Lowe, California 

View of Half Dome and Yosemite Valley from Yosemite Trail, Yosemite National Park, ca.1900-1930 

A group of climbers scaling the rock face Half Dome in Yosemite Valley (Yosemite National Park), 1930 

Paiute Indian woman making basket in the Yosemite Valley, ca.1900-1902 

Mule team and loaded ore wagons at stamp mill, Mojave Desert, ca.1900 

Five people stopping for water at Granite Wells, Death Valley, ca.1900-1950 

Kindling being brought to market on burros, Sonora Town, 1870 

Exterior view of Hotel del Portal in the Yosemite Valley, Mariposa County, California, ca.1900-1940 

Yosemite stage coach beside "Fallen Monarch", one of the Wawona Big Trees, in Yosemite National Park, ca.1900 

Yosemite Falls and the valley behind in Yosemite National Park, ca.1900-1930 

"Baby Gauge" mine train at the mining camp of Ryan, Death Valley, ca.1900-1950 

Man and woman sitting in a hole in one of the Wawona Big Trees, in Yosemite National Park, ca.1900