Beaver, the Moraine Colony, 19-46; characteristics and usefulness, 19, 40, 41, 46, 47; dams, 21, 31-34, 45, 53, 54; houses, 21, 22, 31, 42, 44, 54; felling trees, 21, 24, 25, 58-65; harvest piles, 22, 41, 42, 56, 57, 65, 66; coöperation, 22-24, 43, 44; working by daylight, 23, 62; play, 23; transporting logs and branches, 23, 24, 54-62; village destroyed by fire, 26, 27; attacked by mountain lion, 28, 29, 35, 36; attacked by coyote, 29, 30, 36; journeying by water and by land, 30, 31; migration from ruined village, 29-31; raided by trappers, 31; need of ponds, 34, 35; house dynamited, 35; young, 36, 37; a migration witnessed, 38, 39; aged beaver, 38, 39, 51, 52, 63-65; explorations of old males, 39, 40; the first conservationist, 40, 41; making a new pond, 44, 45; pitchy wood and dead wood avoided, 45, 46; canals, 45, 56; ford, 45, 52, 66; the Spruce Tree Colony, 51-67; tunnels, 53; log slides, 54-56; the Island Colony, 61, 62; ready for winter, 66. Beetles, depredations in forests, 174-181, 195. Big Thompson River, 345. Big tree, immune from insects, 173; seeds, 299. Bighorn. _See_ Sheep, mountain. Birds, of Estes Park, 347. Blizzard, 311-316. Borers, depredations in forests, 182, 195. Camp-bird. _See_ Jay, Rocky Mountain. Camp-fires, as origins of forest fires, 152, 153, 155, 156. Carpenter, Prof. L. G., on forests, 127. Chapman, Frank M., 200. Chasm Lake, 343. Cherry, seed-sowing, 298, 299. Chipmunk, 325. Cimarron, 242. Clouds, of mountain-tops, 80, 81; a snow-cloud, 81-84. Cocoanut, 302. Conifers, seed-distribution, 297, 298. Cottonwood, seeds, 296, 301. Couple, elderly, in a log house, 110-112. Court-House Rock, 242, 243. Coyote, attacking beaver, 29, 30, 36; fleeing from a forest-fire, 143; after the fire, 149. Deer, in a forest fire, 142, 143. _Dendroctonus_, 196. Dogs, story of a tramp dog, 93-105; Scotch and the bear Johnny, 213; Scotch in a mountain blizzard, 309-320. Electrical storms, 85-88. Elk, in a forest fire, 142. Erosion, after forest fires, 165, 166; by glaciers, 251; a study of, 271, 272, 281-286. Estes Park, glaciers in, 260, 338, 341-343; attractions, 337, 338, 348; forest fires, 339; forests, 340, 341; Long's Peak, 341-343; lakes, 343, 344; streams and cañons, 344, 345; animal life, 346; flowers, 346, 347; birds, 347; trails, 347. Fern Lake, 347. Fir, Douglas, 279. Fires. _See_ Forest Fires. Flat-Top, 341, 347. Flowers, of Estes Park, 346, 347. Foot, an injured, 233, 234, 241-243.