The New York Public Library has three major digital exhibitions currently running to complement their in-house exhibits. Together, these exhibits constitute a marvelous introduction to Western history via primary documents and images from the era. Surveyors of the West features diaries, photographs, stereographs, and field notes related to the work of William Henry Jackson, a government photographer influential in the establishment of US parks in the West, and Robert Brewster Stanton, a civil and mining engineer who surveyed the Grand Canyon between 1889 and 1890, and who was chief engineer for the Denver Colorado Canyon and Pacific Railroad. (Copyright Internet Scout Project, 1994-2002.
http://scout.cs.wisc.edu/)