The reason the implements are deposited in the grave is that they are supposed to be necessary to his being in the world of spirits. It is a very ancient custom, perhaps coeval with their existence.
We know of no tumulus or barrow erected either in former or later times through this country containing many bodies or possessing the character of a charnel house, but are in the knowledge of the graves of many chiefs either on scaffolds or on hills.
Bodies are never interred in a sitting posture, though that manner is sometimes observed when deposited in the lodge above ground and the posture preserved by stakes driven in around the body with forks on the end supporting the different members and equilibrium.
There are no herbs or spices placed with the corpse, neither is it submitted to any process analogous to embalming. It is enveloped, as before mentioned, in skins to which those who can afford it add scarlet cloth and blankets.
Scaffolding of corpses is the general manner of disposing of them with all the prairie tribes, and the way they are prepared has been alluded to. They would prefer having them boxed instead of baled, but have no tools to prepare timber, and even if they had can not at all times procure it, which together with their lack of means to excavate in these frozen regions were no doubt the original causes of this mode of burial. When bodies are brought to the trading houses for interment or scaffolding they are always boxed by the whites, the coffin being made large enough to contain the implements and ornaments enveloped with the corpse. This in former times was a great honor done the Indians and highly recompensed, but of later years is a great bore and expense.
This method of securing them can, however, only be embraced when death takes place near the houses, and consequently happens to few. The Mandan and Gros Ventres, being stationed at the fort with those nations, have their dead boxed by the whites and placed on a scaffold made of posts planted near their villages. The Arikara prefer interring them in the ground, and all the rest of the tribes place their dead, secured in the manner described before, in the forks of trees, which in a year or two, as soon as the cords rot off and the envelopes fall to pieces, are blown down, and the bones are found scattered beneath. Carnivorous birds, such as eagles, ravens, and magpies, often pick at the envelope until they get at the body, but if it is well strapped in rawhide it is generally secure from either birds or beasts as long as it remains in the tree.