Animals should be herded during the day at such distances as to leave sufficient grass undisturbed around and near the camp for grazing through the night. METHOD OF MARCHING. Among men of limited experience in frontier life will be found a great diversity of opinion regarding the best methods of marching, and of treating animals in expeditions upon the prairies. Some will make late starts and travel during the heat of the day without nooning, while others will start early and make two marches, laying by during the middle of the day; some will picket their animals continually in camp, while others will herd them day and night, etc., etc. For mounted troops, or, indeed, for any body of men traveling with horses and mules, a few general rules may be specified which have the sanction of mature experience, and a deviation from them will inevitably result in consequences highly detrimental to the best interests of an expedition. In ordinary marches through a country where grass and water are abundant and good, animals receiving proper attention should not fall away, even if they receive no grain; and, as I said before, they should not be made to travel faster than a walk unless absolutely necessary; neither should they be taken off the road for the purpose of hunting or chasing buffalo, as one buffalo-chase injures them more than a week of moderate riding. In the vicinity of hostile Indians, the animals must be carefully herded and guarded within protection of the camp, while those picketed should be changed as often as the grass is eaten off within the circle described by the tether-rope. At night they should be brought within the chain of sentinels and picketed as compactly as is consistent with the space needed for grazing, and under no circumstances, unless the Indians are known to be near and an attack is to be expected, should they be tied up to a picket line where they can get no grass. Unless allowed to graze at night they will fall away rapidly, and soon become unserviceable. It is much better to march after nightfall, turn some distance off the road, and to encamp without fires in a depressed locality where the Indians can not track the party, and the animals may be picketed without danger.