From The Oregon Trail: Sketches of Prairie and Rocky-Mountain Life, by Francis Parkman (E-Bookarama, 2020), Kindle pp. 114-116:
Thus we passed hill after hill and hollow after hollow, a country arid, broken and so parched by the sun that none of the plants familiar to our more favored soil would flourish upon it, though there were multitudes of strange medicinal herbs, more especially the absanth, which covered every declivity, and cacti were hanging like reptiles at the edges of every ravine. At length we ascended a high hill, our horses treading upon pebbles of flint, agate, and rough jasper, until, gaining the top, we looked down on the wild bottoms of Laramie Creek, which far below us wound like a writhing snake from side to side of the narrow interval, amid a growth of shattered cotton-wood and ash trees. Lines of tall cliffs, white as chalk, shut in this green strip of woods and meadow land, into which we descended and encamped for the night. In the morning we passed a wide grassy plain by the river; there was a grove in front, and beneath its shadows the ruins of an old trading fort of logs. The grove bloomed with myriads of wild roses, with their sweet perfume fraught with recollections of home. As we emerged from the trees, a rattlesnake, as large as a man’s arm, and more than four feet long, lay coiled on a rock, fiercely rattling and hissing at us; a gray hare, double the size of those in New England, leaped up from the tall ferns; curlew were screaming over our heads, and a whole host of little prairie dogs sat yelping at us at the mouths of their burrows on the dry plain beyond. Suddenly an antelope leaped up from the wild-sage bushes, gazed eagerly at us, and then, erecting his white tail, stretched away like a greyhound. The two Indian boys found a white wolf, as large as a calf in a hollow, and giving a sharp yell, they galloped after him; but the wolf leaped into the stream and swam across. Then came the crack of a rifle, the bullet whistling harmlessly over his head, as he scrambled up the steep declivity, rattling down stones and earth into the water below. Advancing a little, we beheld on the farther bank of the stream, a spectacle not common even in that region; for, emerging from among the trees, a herd of some two hundred elk came out upon the meadow, their antlers clattering as they walked forward in dense throng. Seeing us, they broke into a run, rushing across the opening and disappearing among the trees and scattered groves. On our left was a barren prairie, stretching to the horizon; on our right, a deep gulf, with Laramie Creek at the bottom. We found ourselves at length at the edge of a steep descent; a narrow valley, with long rank grass and scattered trees stretching before us for a mile or more along the course of the stream. Reaching the farther end, we stopped and encamped. An old huge cotton-wood tree spread its branches horizontally over our tent. Laramie Creek, circling before our camp, half inclosed us; it swept along the bottom of a line of tall white cliffs that looked down on us from the farther bank. There were dense copses on our right; the cliffs, too, were half hidden by shrubbery, though behind us a few cotton-wood trees, dotting the green prairie, alone impeded the view, and friend or enemy could be discerned in that direction at a mile’s distance.