[120]This information was obtained by the author from Jesse M. Matlock, formerly Mrs. William Peterson and Mabel M. White, an adopted daughter, in an interview at Salmon City, June 7, 1943. The latter remembers hearing Mr. Peterson express regret that the Folsom-Cook-Peterson Expedition was not given more recognition for its discovery. Mr. Peterson died in 1918. [121]C. W. Cook and D. E. Folsom, “Cook-Folsom Expedition to the Yellowstone Region 1869,” _Haynes Bulletin_ (Jan. 1923). [122]C. W. Cook, “Remarks of C. W. Cook, Last Survivor of the Original Explorers of the Yellowstone Park Region,” Yellowstone Park Library, Mammoth, Wyoming. Two sons of Cornelius Hedges were present at the celebration which was sponsored by The National Editorial Association. [123]W. T. Jackson, “The Cook-Folsom Exploration of the Upper Yellowstone 1869,” _The Pacific Northwest Quarterly_, XXXII (1941), 320-21. [124]Hiram M. Chittenden, _Yellowstone National Park_, p. 60. [125]Nathaniel P. Langford, _The Discovery of Yellowstone Park 1870_ (St. Paul, Minn.: J. E. Haynes, 1923), p. 80. [126]Louis C. Crampton, _Early History of Yellowstone National Park and Its Relations to National Park Policies_ (Washington, D. C.: United States Government Printing Office, 1923), p. 14. [127]Yellowstone Park Scrap Book, I, 33. Park Library, Mammoth, Wyoming. [128]L. P. Brockett, _Our Western Empire_ (San Francisco: William Garretson and Co., 1881), p. 1247. [129]_Ibid._, p. 1243. [130]Cornelius Hedges, “Yellowstone Lake,” Crampton’s _Early History_, p. 110. [131]Truman C. Everts, “Thirty Seven Days of Peril,” _Scribner’s Monthly_, III (Nov. 1871), 1-17. [132]Cornelius Hedges, “Journal,” _Contributions_, Montana Historical Society, V, 387. [133]Nathaniel P. Langford, _op. cit._, p. 158. [134]Gustavus C. Doane, “Report Upon the Yellowstone Expedition,” Crampton’s _Early History_, p. 138. [135]Henry D. Washburn, “The Yellowstone Expedition,” _Ibid._, p. 96. [136]Rudyard Kipling, _American Notes_, p. 159. [137]L. P. Brockett, _op. cit._, p. 1254. [138]F. V. Hayden, _American Journal of Science_, III (March, 1872), 174. [139]Arnold Hague, “The Yellowstone National Park,” _Scribner’s Magazine_, XXXV (May, 1904), 519. [140]W. Turrentine Jackson, “The Creation of Yellowstone Park,” _The Mississippi Valley Historical Review_ XXIX, 2 (September, 1942), 189-90. [141]N. P. Langford, Preface to “The Folsom-Cook Exploration of the Upper Yellowstone in the Year 1869,” _Contributions_, Historical Society of Montana, V (1904), 312. [142]Truman C. Everts, _op. cit._, p. 16. [143]H. M. Chittenden, _Yellowstone National Park_, p. 69. [144]_Ibid._, p. 70. [145]Louis C. Crampton, _Early History of Yellowstone_, p. 25.