SELECTION OF CAMPS. The security of animals, and, indeed, the general safety of a party, in traveling through a country occupied by hostile Indians, depends greatly upon the judicious selection of camps. One of the most important considerations that should influence the choice of a locality is its capability for defense. If the camp be pitched beside a stream, a concave bend, where the water is deep, with a soft alluvial bed inclosed by high and abrupt banks, will be the most defensible, and all the more should the concavity form a peninsula. The advantages of such a position are obvious to a soldier's eye, as that part of the encampment inclosed by the stream is naturally secure, and leaves only one side to be defended. The concavity of the bend will enable the defending party to cross its fire in case of attack from the exposed side. The bend of the stream will also form an excellent corral in which to secure animals from a stampede, and thereby diminish the number of sentinels needful around the camp. In herding animals at night within the bend of a stream, a spot should be selected where no clumps of brush grow on the side where the animals are posted. If thickets of brush can not be avoided, sentinels should be placed near them, to guard against Indians, who might take advantage of this cover to steal animals, or shoot them down with arrows, before their presence were known. In camping away from streams, it is advisable to select a position in which one or more sides of the encampment shall rest upon the crest of an abrupt hill or bluff. The prairie Indians make their camps upon the summits of the hills, whence they can see in all directions, and thus avoid a surprise. The line of tents should be pitched on that side of the camp most exposed to attack, and sentinels so posted that they may give alarm in time for the main body to rally and prepare for defense. SANITARY CONSIDERATIONS. When camping near rivers and lakes surrounded by large bodies of timber and a luxuriant vegetation, which produces a great amount of decomposition and consequent exhalations of malaria, it is important to ascertain what localities will be the least likely to generate disease, and to affect the sanitary condition of men occupying them. This subject has been thoroughly examined by Dr. Robert Johnson, Inspector General of Hospitals in the English army in 1845; and, as his conclusions are deduced from enlarged experience and extended research, they should have great weight. I shall therefore make no apology for introducing here a few extracts from his interesting report touching upon this subject: