"There are several varieties of the wolf species on the American prairies, the most numerous and formidable of which is the white wolf, found in great numbers in high latitudes and near the Rocky Mountains. These animals are equal in size, in many instances, to the largest Newfoundland dog; and, from the whiteness of their hair, appear, at a distance on the green prairies, much like a flock of sheep, and often are seen to the number of fifty or a hundred in a pack; and in this way following the numerous herds of buffaloes from one end of the year to the other, gorging their stomachs with the carcasses of those animals that fall by the hands of the hunters or from sickness and old age. Whilst the buffaloes are grouped together, the wolves seldom attack them, as the former instantly gather for the combined resistance, which they effectually make. But when the herds are traveling, it often happens that an aged or wounded one lingers at a distance behind, and when fairly out of sight of the herd, is set upon by swarms of these voracious hunters, which are sure to last to torture him to death, and use him up at a meal."