A slight sprinkling of rain comes on at daybreak, and we see the infantry hurrying off northward through the misty light. We soon follow down the right bank, the Fifth Cavalry leading the column of horse. Stanton tells us that a large body of Sioux are not more than four days ahead--were here in force not four days ago. It is easy to see that we are on the trail of an immense number of Indians--eight to ten thousand--but we judge it to be a fortnight old. At 9.15 a cold, driving rain sets in, and whirls in our faces as we march. At two p.m. we bivouac again, and begin to growl at this will-o'-the-wisp business. The night, for August, is bitter cold. Ice forms on the shallow pools close to shore, and Captain Adam, who commands the guard, declares that the thermometer was at zero at daybreak. "What thermometer?" is the question. "Vell, any thermometer as was tam fool enough to get here--_un'stand_?" is our veteran's characteristic reply, and it puts us in better humor. Stiff and cold when we march at seven o'clock on the 10th, we have not long to suffer from that cause. A bright sun pours down in recompense. We march five miles, halt, and graze awhile; then push on again along a broad, beaten trail over which countless hordes of ponies must have recently passed. Thick clouds of dust rise high above the bluffs on either side; the valley opens out wide and rolling east and west. Here the Indian flight has been so rapid that the work of destruction is incomplete, and the grass is excellent in many a spot. "The grandest country in the world for Indian and buffalo now," says General Carr. "Two years hence it will be the grandest place for cattle."