Sketch of Jackson's Stairway, located on the north wall of fthe canyon near Chetro Ketl. William Henry Jackson, a photographer for the US Geological and Geographic Survey of the Territories, was the first to describe the prehistoric stairway carved into the sandstone cliff face.
May 10, 1877
By William H. Jackson
Chaco Culture National Historical Park,
CHCU 2447, Neg 3215