- Wonderland 1900: Descriptive Of The Region Tributary To The Northern Pacific Railway And The Story Of Lewis And Clark's Exploration
- The Trail of Lewis and Clark, 1804-1904, Vol. 1 of 2: A Story of the Great Exploration Across the Continent in 1804-6; With a Description of the Old Trail, Based Upon Actual Travel Over It, and of the
- The Trail of Lewis and Clark, 1804-1904: A Story of the Great Exploration Across the Continent in 1804-6; with a Description of the Old Trail, Based ... the Changes Found a Century Later, Volume 2
- 6,000 Miles Through Wonderland: Being a Description of the Marvelous Region Traversed by the Northern Pacific Railroad
- Nathaniel Pitt Langford: The Vigilante, the Explorer, the Expounder and First Superintendent of the Yellowstone Park













