12. Annual Reports of the United States Geological Survey. The serial numbers of these reports begin with June 30, 1880, the first report being for the year ending at that time. Nearly all these reports contain valuable references to the Park, most of them being from the pen of Prof. Arnold Hague. One article of great importance, by Walter Harvey Weed (Ninth Annual Report, 1888, pp. 613-676), on the formation of hot springs deposits through the agency of vegetable growth, deserves particular notice. Washington: Government Printing Office. 13. Aquatic Invertebrate Fauna of the Y. N. P., Preliminary Report upon. S. A. Forbes. Bulletin United States Fish Commission for 1891, p. 215. Washington: Government Printing Office. 1893. Arthur, Chester A., 66. 14. Ascent of Mt. Hayden. N. P. Langford. _Scribner's_ (Old) _Monthly_, vol. vi, p. 129. 15. Astoria.--Washington Irving.--Chapter xv contains a reference to John Colter. Attractions of the Y. N. P., 96. 16. Attractions of the Y. N. P. _Kansas City Review._ April 1880, p. 743. 17. Autumn in the Yellowstone Park. L. Rutgers. In his _On and off the Saddle_. New York: Putnam, 1894, pp. 1-19. Barlow, Captain J. W., 94. 18. Battle of the Big Hole. G. O. Shields. Chicago and New York: Rand, McNally & Company. 1889. Contains an account of the Nez Percé Campaign. Beam, Wm., 21. 19. Bicycle Tour of the Y. N. P. First. W. O. Owen. _Outing_, vol. xviii p. 191. 20. Black Hills, The, and American Wonderland. H. N. Maguire. _The Lakeside Library_, vol. iv, p. 298. 21. Bonneville, Captain, The Adventures of. Washington Irving. Chapter xxiii contains a reference to John Colter, the Stinkingwater River, and to "Colter's Hell." 22. Botanical Observations in Western Wyoming. C. C. Parry. _American Naturalist_, vol. viii, pp. 9, 102, 175, 211. Boutelle, Capt. F. A., 8. Brackett, W. S., 63. Bradbury, J., 115. Bradley, F. H., 10. Brockett, G. P., 152 Brown, R., 125. Bunce, O. B., 83. Butler, J. D., 65. 23. Calumet of the Coteau. P. W. Norris. Philadelphia: J. B. Lippincott & Co., 1883. 24. Camping in the Y. N. P. Captain Geo. S. Anderson. _Youth's Companion_, October 17, 1895, p. 488. Gives exhaustive directions for those desiring to camp through the Park. Catlin, George, 62. Chittenden, H. M., 6, 98. 25. Chronicles of the Yellowstone. E. S. Topping. St. Paul: Pioneer Press Company. 1883. Commissioner of Fish and Fisheries, Report of, 91. Comstock, T. B., 45, 90, 118, 141. Conger, P. H., 8. 26. Congressional Reports (only the more important): To accompany House Bill 764 (Act of Dedication), 42d Cong., 2d Session. Report of a Special Committee of the House of Representatives appointed by the Speaker on the 4th day of March, 1885, to investigate, among other things, the Y. N. P. House Report No. 1,076, 49th Cong., 1st Sess., pp. 245-270.