Related Web Page:

Yellowstone National Park, Its Exploration and Establishment - Hayden and Barlow Parties
http://www.nps.gov/history/history/online_books/haines1/iee2e.htm

Washburn and Hayden Expeditions
http://www.wyomingtalesandtrails.com/photos2.html

Past Climatic Patterns - Official Park Website
http://www.nps.gov/yell/historyculture/archeologyclimate.htm

Ferdinand Vandeveer Hayden - Wikipedia
http://en.wikipedia.org/wiki/Ferdinand_Vandeveer_Hayden

Thomas (Yellowstone) Moran - National Gallery of Art
http://www.nga.gov/feature/moran/moranintro.shtm

Thomas Moran - Wikepedia
http://en.wikipedia.org/wiki/Thomas_Moran

Thomas Moran - American Visionaries - National Park Service Website
http://www.nps.gov/history/museum/exhibits/moran/index.htm

Thomas Moran - Yellowstone Artwork - National Park Service Website
http://www.nps.gov/history/museum/exhibits/moran/gallery1.htm

Thomas Moran's Diary - Official Park Website
http://www.nps.gov/yell/historyculture/thomasmoransdiary.htm

William Henry Jackson - Wikipedia
http://en.wikipedia.org/wiki/William_Henry_Jackson

William Henry Jackson Photos - National Park Service Website
http://www.nps.gov/history/museum/exhibits/moran/gallery2.htm