Sapphire Pool, 228. Scenery of the Y. N, P., 155, 209. in winter, 197. Scenic portion of tourist route, 260. Schemes to destroy the Y. N. P., 268. Schofield, Lieutenant, meets Radersburg tourists, 120. Schurz, Carl, visits Park, 106. Schwatka, Frederick, attempts winter journey through Y. N. P., 108. Seasons in the Y. N. P., 193, 199 Secretary of the Interior applies for military aid, 137. instruction of, to first superintendent, 270. Segregation projects, 133, 278, 280, 365. Sepulcher Mountain, 215. Sequoia National Park, 97. Sheepeater Indians, 8, 18, 306. characteristics of, 10, 11. ignorant of geyser regions, 15. number of, 17. original occupants of park country, 10, 11, 13, 14, 17. relics of, 13. Sheridan Mt., 15, 152, 242. an extinct volcano, 156. Sheridan, General P. H., aids exploration and discovery, 75. gives public warning of dangers to Park, 106, 133. quoted, 15. visits Park, 106, 107. Sherman, General W. T., quoted, 111, 256. visits Park, 105. Shively, Nez Percé guide, 123. Shoshonean family of Indians, 8. territory, 37. Shoshone Indians, 8, 18. characteristics of, 9, 10. Spanish articles among, 5. treaty with, 18. Shoshone Geyser Basin, 239. Shoshone Lake, 151, 239, 333. Shoshone Point, 239. Sierra Shoshone Range, 152. Silica, its function in geyser formation, 170. Siouan family of Indians, 8. territory, 37. _Ski_, Norwegian snow-shoe, 194. Slough Creek, 71. Smith, Jacob, member of Washburn Party, 76. Smith, Jedediah, fur trader, 36. Snake Creek, battle of, 124. Snake River, 26, 150. Snowfall in Y. N. P., 193. Snow-shoe traveling in Y. N. P., 194, 195, 196. Snowy Range, 152. Soaping Geysers, 165, 343. Soda Butte, 264. Cañon, 264. Creek, 150. Soda Spring, 221. Solar eclipse of 1860, 59. South-west Fur Co., 35. Spanish traders and name "Yellowstone," 5. Specimen Ridge, 179, 180, 263. Spike Geyser, 243. Splendid Geyser, 230. Sponge, The, 232. Spring Creek Cañon, 238. Spurgin, Captain W. F., builds road for Howard across Y. N. P., 124, 126. Stage rides in Y. N. P., 277. Stanley, E. J., quoted, 322. Stanton, Captain W. S., makes reconnaissance through Y. N. P., 106. Steady Geyser, 225. Steamboat, first to reach mouth of Y. River, 87. Steamboat Spring, 175, 244. Steam vents, 175. Stevenson, James, ascends Grand Teton, 222, 309. biographical sketch, 307-308. builds first boat on Y. Lake, 337. Stewart, J., member of Helena party of tourists, 112. Stickney, Benj., member of Washburn party, 76. descends to bottom of Grand Cañon, 80. Stinking Cabin Creek, 322. Stone, Benj., experience of with Nez Percés, 123. member Helena party of tourists, 112. Stone, Mrs. H.