The cows remain fat from July to the latter part of December. The rutting season occurs towards the latter part of July, and continues until the beginning of September, after which month the cows separate from the bulls, in distinct herds, and bring forth their calves in April. The calves seldom separate themselves from the mother under the age of one year; and cows are often seen accompanied by the calves of three seasons.

The meat of the bison has often been compared with that of the domestic ox, and the preference yielded to the latter, as an article of food. This decision, however, we cannot, from our experience confirm; it appeared to us that although of a somewhat coarser fibre, yet, after making due allowance for the situation in which we were placed, our appetites often increased by hunger and privation, that the flesh of the bison is in no degree inferior in delicacy and sweetness to that of the common ox. But that the flesh of those which we were accustomed to eat was more agreeably sapid than that which formed a subject of comparison to the authors alluded to, is altogether possible, as the grass upon which they usually fed was short, firm, and nutritious, considerably differing in its nature from the luxuriant and less solid grass nourished by a fertile soil. It was {160} preferred by the party to the flesh of the elk or deer, which was thrown away when it could be substituted by the bison meat.

To the fat of the bison we conceded a decided superiority over that of the common ox, as being richer and sweeter to the taste.

As our stock of provision was nearly exhausted, permission was given, when we had arrived near a suitable place for our mid-day halt, to the hunters to go out in pursuit of bisons, and in a short time two were killed. The choice parts of these were taken and placed upon pack-horses, to be carried forward to our next encampment, where some of it might be jerked on the ensuing day, which was Sunday.

Aside from the vast herds of bisons which it contains, the country along the Platte is enlivened by great numbers of deer, badgers,[111] hares,[112] prairie wolves, eagles, buzzards,[113] ravens, and owls: these, with its rare and interesting plants, in some measure relieved the uniformity of its cheerless scenery. We found a constant source of amusement in observing the unsightly figure, the cumbrous gait, and impolitic movements of the bison; we were often delighted by the beauty and fleetness of the antelope, and the social comfort and neatness of the prairie dog.

This barren and ungenial district appeared, at this time, to be filled with greater numbers of animals than its meagre productions are sufficient to support. It was, however, manifest that the bisons, then thronging in such numbers, were moving towards the south. Experience may have taught them to repair at certain seasons to the more luxuriant plains of Arkansa and Red river. What should ever prompt them to return to the inhospitable deserts of the Platte, it is not perhaps, easy to conjecture. In whatever {161} direction they move, their parasites and dependants fail not to follow. Large herds are invariably attended by gangs of meagre, famine-pinched wolves, and flights of obscene and ravenous birds.

We have frequently remarked broad shallow excavations in the soil, of the diameter of from five to eight feet, and greatest depth from six inches to eighteen. These are of rare occurrence near the Missouri, as far as Engineer cantonment, and in other districts where the bison is seldom seen at the present day; and when they do exist there, they are overgrown by grass and nearly obliterated. As you approach the country, still the constant residence of these animals, the excavations become more numerous, and are less productive of grass. They now are so numerous as to be of constant recurrence, offering a considerable impediment to the traveller, who winds his way amongst them, and are entirely destitute of grass, their surface being covered with a deep dust. Until recently, we had no opportunity to observe the cause which gives rise to these appearances; but we were now convinced that they were the result of the habit which the bulls have, in common with the domestic bull, of scraping up the earth with their fore feet, in the process of dusting themselves: they serve also as places for rolling and wallowing; a gratification which the bison bull indulges in as frequently, and in the same manner as the horse.

Some extensive tracts of land along the Platte, particularly those portions which are a little elevated, with an undulating or broken surface, are almost exclusively occupied by a scattered growth of several species of wormwood, (artemisia) some of which are common to this country, and that on the lower Missouri: we may enumerate the following—A. ludoviciana, A. longifolia, A. serrata, A. columbiensis,[114] {162} A. cernua, A. canadensis; most of these species have simple or finely divided compound leaves, which are long and slender, and canescent, like those of the A. absynthium, the common wormwood of the gardens. The peculiar aromatic scent, and the flavor of this well known plant, is recognized in all the species we have mentioned. Several of them are eaten by the bisons, and our horses were sometimes reduced to the necessity of feeding upon them.

The intense reflection of light and heat from the surface of many tracts of naked sand, which we crossed, added much to the fatigue and suffering of our journey. We often met with extensive districts covered entirely with loose and fine sand blown from the adjacent hills. In the low plains along the river, where the soil is permanent, it is highly impregnated with saline substances, and too sterile to produce any thing except a few stinted carices and rushes.

On the evening of the twenty-fourth, after we had encamped, several bull bisons, being on the windward side, came so near us as to create a disturbance among our horses, who were not yet so familiarized to the formidable appearance of those animals, as to regard their near approach with indifference. The bulls at length became troublesome, approaching so near to smell at the horses, that some of the latter broke the cords by which they were fastened, and made their escape. A man was then sent to frighten away the bisons, who, in their turn, exhibited as much terror as they had occasioned to our horses.