The great middle plains of the United States, parts of which are still scantily peopled by men of Mexican parentage, while other parts have been but recently won from the warlike tribes of Horse Indians, now form a broad pastoral belt, stretching in a north and south line from British America to the Rio Grande. Throughout this great belt of grazing land almost the only industry is stock-raising, which is here engaged in on a really gigantic scale; and it is already nearly covered with the ranches of the stockmen, except on those isolated tracts (often themselves of great extent) from which the red men look hopelessly and sullenly out upon their old hunting-grounds, now roamed over by the countless herds of long-horned cattle. The northern portion of this belt is that which has been most lately thrown open to the whites; and it is with this part only that we have to do.