photo courtesy National Archives [57-PS-61]:
The Grand Canyon, photographed by John Hillers' assistant, James Fennemore,
while accompanying John Wesley Powell on his pioneering expedition down the Colorado River in 1869.
Hillers himself stands waving from the edge of a distant cliff on the right.

May 24, 1869 - Powell's First Expedition to explore the Grand Canyon

The Powell Expedition (led by Major John Wesley Powell, a one-armed Civil War veteran)
begins in Green River City, Wyoming.