William Henry Jackson Chromolithographs

William Henry Jackson was a painter, geological survey photographer and explorer famous for his images of the American West. He was born in Keeseville, New York in 1843 and showed an aptitude for painting from a young age. Jackson volunteered for the 12th Vermont Infantry of the Union Army in 1862. He sketched camp life and mapped the countryside. After the war, he returned to painting. His work evenually led him west in 1866, where he worked for Union Pacific, American geologist Ferdinand Hayden, and the U.S. Geological Survey. Jackson's photographs played an important role in convincing Congress to establish Yellowstone National Park in 1872. Jackson continued to photograph the west, and eventually settled in Denver, Colorado, where he worked as a commercial landscape photographer and published his photographs as postcards.

Chromolithography is a method for making multi-color prints. It stemmed from the process of lithography and is often referred to as photochrome. Colorized images are produced from black-and-white phtographic negatives by the transfer of the negative onto a lithographic printing plates.