We breakfasted the next morning at half-past five, and left our encampment early. The morning was cool, the thermometer being at 45 deg. Quitting the river bottom, the road ran along the uplands, over a rolling country, generally in view of the Kansas from eight to twelve miles distant. Many large boulders, of a very compact sandstone, of various shades of red, some of them of four or five tons in weight, were scattered along the hills; and many beautiful plants in flower, among which the _amorpha canescens_ was a characteristic, enlivened the green of the prairie. At the heads of the ravines I remarked, occasionally, thickets of _saix longifolia_, the most common willow of the country. We traveled nineteen miles and pitched our tents at evening on the head-waters of a small creek, now nearly dry, but having in its bed several fine springs. The barometer indicated a considerable rise in the country--here about fourteen hundred feet above the sea--and the increased elevation appeared already to have some slight influence upon vegetation. The night was cold, with a heavy dew; the thermometer at 10 P.M. standing at 46 deg., barometer 28.483. Our position was in longitude 96 deg. 14' 49", and latitude 39 deg. 30' 40". The morning of the 20th was fine, with a southerly breeze and a bright sky; and at seven o'clock we were on the march. The country to-day was rather more broken, rising still, and covered everywhere with fragments of silicious limestone, particularly on the summits, where they were small, and thickly strewed as pebbles on the shore of the sea. In these exposed situations grew but few plants; though, whenever the soil was good and protected from the winds, in the creek bottoms and ravines, and on the slopes, they flourished abundantly; among them the _amorpha_, still retaining its characteristic place. We crossed, at 10 A.M. the Big Vermilion, which has a rich bottom of about one mile in breadth, one-third of which is occupied by timber. Making our usual halt at noon, after a day's march of twenty-four miles, we reached the Big Blue, and encamped on the uplands of the western side, near a small creek, where was a fine large spring of very cold water. This is a clear and handsome stream, about one hundred and twenty feet wide, running with a rapid current, through a well-timbered valley. To-day antelope were seen running over the hills, and at evening Carson brought us a fine deer. Longitude of the camp 96 deg. 32' 35", latitude 39 deg. 45' 08". Thermometer at sunset 75 deg. A pleasant southerly breeze and fine morning had given place to a gale, with indications of bad weather; when, after a march of ten miles, we halted to noon on a small creek, where the water stood in deep pools. In the bank of the creek limestone made its appearance in a stratum about one foot thick. In the afternoon, the people seemed to suffer for want of water. The road led along a high dry ridge; dark lines of timber indicated the heads of