118. Unexplained Phenomena of the Geyser Basins of the Y. N. P. Theodore B. Comstock. _Popular Science Monthly_, vol. xii, p. 372.
United States Geological Survey, Annual Reports of, 9 to 12.
119. Valley of the Upper Yellowstone. David E. Folsom. _Western Monthly_, vol. iv, p. 60, July, 1870. Reprinted by Mr. N. P. Langford, with an interesting preface by himself. St. Paul, Minn. 1894.
120. Vigilante Days and Ways. N. P. Langford. St. Paul: D. D. Merrill & Co. 1893. Contains numerous references to the Park.
121. Washburn Yellowstone Expedition, The. Walter Trumbull. _Overland Monthly_, vol. vi, pp. 431, 489.
122. _Wasp, The._ Vol. i, No. 17, August 13, 1842. Contains the article quoted on pp. 44-49, stated to have been an extract from an unpublished work entitled "Life in the Rocky Mountains." Author unknown. _The Wasp_ was a Mormon paper, published at Nauvoo, Ill.
123. Week in the Yellowstone, A. J. Sanford Saltus. New York: Knickerbocker Press. 1895. Printed for private circulation.
124. Winter Sanitarium for the American Continent. _Popular Science Monthly_, vol. xxvii, p. 290.
125. Wonderland of America. Robert Brown. In the _Countries of the World_, vol. iv. London, Paris, and New York.
Wonderland, American, The Black Hills and, 20.
126. Wonderland Series. O. D. Wheeler. Annual Publication of Northern Pacific Railroad Company, describing the country along the line of that railroad. These books all contain valuable articles on the Park. They include "6,000 Miles through Wonderland," 1893, "Indianland and Wonderland," 1894, and "Sketches of Wonderland," 1895.
127. Wonders of the Rocky Mountains. The Y. N. P. How to reach it. F. V. Hayden. In _Williams' Illustrated Guide to the Pacific Railroad, California_, etc. New York. 1876.
128. Wonders of the West. More about the Yellowstone. F. V. Hayden. _Scribner's Monthly_, vol. iii, No. 4, p. 388.
129. Wonders of the Yellowstone, The. N. P. Langford. _Scribner's Monthly_, vol. ii, pp. 1, 113.
130. Wonders of the Yellowstone, The. Rossiter W. Raymond. In his _Camp and Cabin_. New York: Fords, Howard & Hulburt. 1880.
131. Wonders of the Yellowstone, The. James Richardson. New York: Scribner, Armstrong & Co. 1872.
132. Wonders of the Yellowstone, The. De Vallibus. _Contributor_, Salt Lake City, vol. v, pp. 5, 47, 86.