The word Saukee, or O-sau-kee, now written Sauk or more commonly Sac, is derived from a compound in the Algonquin or Chippeway language, a-saw-we-kee, which means "yellow earth." Mus-qua-kee, the name of the Fox Indians, signifies "red earth." These two tribes have long resided together, and now constitute one people, although there are some internal regulations among them which tend to preserve a distinctive name and lineage. The chiefs, on ceremonial occasions, claim to be representatives of independent tribes, but this distinction is nominal. For many years past the principal chief of the Sacs, has been, in fact, the chief of the Foxes likewise. They are united in peace and war, speak the same language, claim the same territory, have similar manners and customs, and possess traditions which represent them as descended from the one common origin--the great Chippeway nation. Both tribes originally resided upon the waters of the St. Lawrence. The Foxes removed first to the west, and established themselves in the region of Green Bay. Upon a river bearing their name, which empties into the head of this Bay, they suffered a signal defeat by a combined body of French and Indians, at a place, since known as La Butte de Mort, or the Hill of the Dead.[1] Subsequently to this battle, they were joined by the Sacs, who having become involved in a war with the Iroquois or Six Nations, were also driven to the westward. They found their relatives, the Foxes, upon Green Bay, but so far reduced in numbers, by the attacks of other tribes, that they were no longer able to sustain themselves as an independent people. The union between these two tribes, which then took place, and continues to this day, was as much a matter of necessity as of feeling. The period of their migration from the St. Lawrence to the upper Lakes cannot be satisfactorily ascertained. La Hontan speaks of a Sac village on Fox river, as early as 1689; and Father Hennepin, in 1680, mentions the Ontagamies or Fox Indians, as residents on the bay of Puants, now Green Bay. From this place, the Sauks and Foxes, crossed over to the eastern bank of the Mississippi, and combining with other tribes, began to act on the offensive. The period of this irruption from the north, it is not easy to determine. Major Thomas Forsyth, who resided for near twenty years among the Sauks and Foxes, in a manuscript account of those tribes, now before us, says: