In about an hour 5,000 animals are close up to the encampment, and the teamsters are busy selecting their teams, and driving them inside the "corral" to be yoked. The corral is a circle one hundred yards deep, formed with wagons connected strongly with each other, the wagon in the rear being connected with the wagon in front by its tongue and ox chains. It is a strong barrier that the most vicious ox cannot break, and in case of an attack by the Sioux, would be no contemptible entrenchment. From six to seven o'clock is a busy time; breakfast to be eaten, the tents struck, the wagons loaded, and the teams yoked and brought up in readiness to be attached to their respective wagons. All know, when at seven o'clock the signal to march sounds, that those not ready to take their proper places in the line of march must fall into the dusty rear for the day. There are sixty wagons. They have been divided into sixteen divisions, or platoons of four wagons each, and each platoon is entitled to lead in its turn. The leading platoon of to-day will be the rear one to-morrow, and will bring up the rear, unless some teamster, through indolence or negligence, has lost his place in the line, and is condemned to that uncomfortable post. It is within ten minutes of seven; the corral, but now a strong barricade, is everywhere broken, the teams being attached to the wagons. The women and children have taken their places in them. The pilot (a borderer who has passed his life on the verge of civilization, and has been chosen to the post of leader from his knowledge of the savage and his experience in travel through roadless wastes) stands ready, in the midst of his pioneers and aides, to mount and lead the way. Ten or fifteen young men, not to lead to-day, form another cluster. They are ready to start on a buffalo hunt, are well mounted and well armed, as they need to be, for the unfriendly Sioux have driven the buffalo out of the Platte, and the hunters must ride fifteen or twenty miles to reach them. The cow-drivers are hastening, as they get ready, to the rear of their charge, to collect and prepare them for the day's march. It is on the stroke of seven; the rushing to and fro, the cracking of whips, the loud command to oxen, and what seemed to be the inextricable confusion of the last ten minutes has ceased. Fortunately, every one has been found, and every teamster is at his post. The clear notes of a trumpet sound in the front; the pilot and his guards mount their horses; the leading division of wagons move out of the encampment and take up the line of march; the rest fall into their places with the precision of clock-work, until the post, so lately full of life, sinks back into that solitude that seems to reign over the broad plain and rushing river, as the caravan draws its lazy length toward the distant El Dorado.