Nathaniel Pitt Langford

• Diary of the Washburn Expedition to the Yellowstone and Firehole Rivers in the Year 1870
• The Discovery of Yellowstone Park
• The Folsom-Cook Exploration of the Upper Yellowstone in the Year 1869
• The Wonders Of The Yellowstone
• Vigilante Days and Ways
• Vigilante Days and Ways
• Vigilante Days and Ways : The Pioneers of The Rockies
• Diary of the Washburn Expedition to the Yellowstone and Firehole Rivers in ..
• The Discovery of Yellowstone Park, Journal of the Washburn Expedition to the Yellowstone and Firehole Rivers in the Year 1870
• Vigilante Days and Ways The Pioneers of the Rockies The Makers and Making of Montana and Idaho