"The Ojibwa is one of the largest tribes of the United States, and it is scattered over a considerable area, from the Province of Ontario, on the east, to the Red River of the North, on the west, and from Manitoba southward through the States of Minnesota, Wisconsin, and Michigan. This tribe is, strictly speaking, a timber people, and in its westward migration or dispersion has never passed beyond the limit of the timber growth which so remarkably divides the State of Minnesota into two parts possessing distinct physical features. The western portion of this State is a gently undulating prairie which sweeps away to the Rocky Mountains, while the eastern portion is heavily timbered."