Names of Hot Springs and Geysers, 287. Narrow Gauge Terrace, 214. National Park project, origin of, 87-92. National Park Protective Act, 110, 141-5, 348. National Parks on sites of battle-fields, 97. Natural Bridge, 244. Navigation of Y. Lake and River, 203. New Crater Geyser, 220. _New York Tribune_ quotes Langford on Park project, 92. New Zealand, thermal springs of, 97, 161. Nez Percé Creek, 126, 150, 223. Nez Percé Indians attack Y. N. P. tourists, 118, 121. cede territory to U. S., 113. characteristics of, 114. fate of, 126. impress white man as guide, 14. incursion of, into Y. N. P., 117-123, 215. surrender to Miles, 124. territory of, 112. treaties with, 113. Nez Percé War, beginning of, 115. causes of, 112, 115. criticism upon, 125. statistics of, 125. Niagara Falls compared with the Falls of the Y., 251, 254. original sketch of, 168. Niagara Park, Canadian, 97. New York State, 97. Non-treaty Nez Percés, 113. Norris, P. W., biographical sketch of, 303. builds road of volcanic glass, 218. criticism of his work, 131. discoveries of, 40, 41, 108, 130. names Dunraven Peak after himself, 295. quoted, 15, 218, 265, 307, 314, 324, 331, 343. road work of, 130. second Superintendent Y. N. P., 14, 129, 130. writings of, 131. Norris Geyser Basin, 220, 340. discovery of, 340. North-west Fur Company and name "Yellowstone," 4. sketch of, 33. Oblong Geyser, 230. Obsidian Cliff, 217. first road past, 218. Indian quarry at, 12, 217. Old Faithful, 167, 234-6. discovery of, 82. Oldham, Albert, member Radersburg tourist party, 112. "Old Man of the Mountains," 244. Orange Geyser, 214. Original sketches of Park scenery, 168, 169. Orographic agencies, work of, in Park, 157. Overhead sounds near Y. Lake, 246.