First edition. Mills (1870-1922) was a naturalist and one of the people most responsible for the creation of Rocky Mountain National Park. The narrative is about Mills' experiences and adventures as a solitary camper, mountain climber and peak and nature guide. Some of the contents: snow-blinded on the summit, winter mountaineering, the arctic zone of high mountains, a day with a nature guide, little mountain climber, development of a woman guide. Many of the adventures are in the Rockies and Long's Peak in Colorado. With 31 photographic illustrations including a frontispiece. Hardcover, 271 pages. Very good condition, firmly bound, no writing inside. Light wear to top and bottom of spine.