Looking out during the night, I saw a misshapen gibbous moon, of a strange green-cheese color, setting between the four legs of a mule, whose body made an arched frame for it. The effect was most grotesque. A ride on horseback next morning over the fresh breezy divide was a charming change from the monotonous 'bus. How the larks sang for us on that bright morning! and coyotes and blackbirds with white wings fled away before us. A little after noon we struck the sources of the White River, pleasant springs on a hillside, bubbling forth among the first trees we had seen since we left the Laramie. Then we descended into a fine shady valley: all our old friends were there in thickets--the box-elder, willow, birch and cottonwood, the alder, osier and wild cherry, currant, gooseberry, buffalo-berry and clematis. As we went on, brushing through the thick foliage, the hills on either side became higher, and grew into bastions, castles, donjon-keeps and fantastic clustered chimneys, like Scott's description of the valley of St. John. The river went circling about through the intervale, so that we had to cross it constantly upon the little bridges made during the White River expedition in the February before. It was pleasant thus to wind along under the overarching boughs, coming frequently upon some pretty reach of the stream, where we could watch the cavalcade crossing, dashing out from under the bushes or watering the horses, while the heavy white-topped wagons plunged into the water and slowly mounted the opposite bank. In the distance the men were scouring the hillsides for deer, and perhaps looking out a little for Indians also. We went on in military order, with mounted pickets in advance, in the rear and on both sides; not that there was any danger, but an Indian is an inscrutable mystery, a wolf on two legs, and it is not easy to know what he may do. The valley grew wider and spread into a great bare plain, still bordered with pine-sprinkled bluffs, through which the river dodged about without any apparent reason, and wherever it went the trees followed. Before we came in sight of the agency we were met by several officers and traders, glad of a little change of society. They conducted us to our camp on a pleasant rising ground about a mile from the agency, overlooking the cavalry and infantry camps in front and rear. It is a wild, lonely, fascinating place, this White River Valley, shut out from the world by its castled bluffs, though should we climb them we should only find another desert. We dined under a bower of pine boughs beside our tents, that served for a parlor. In the evening everybody called to see us, including the only two ladies in the place, wives of the traders, who looked too delicate to bear the hardships of the wilderness. Perhaps the hardships are not great, but the loneliness must be terrible in the long, long winters.