Winnebago Indians

first met by Jesuits in Green Bay, WI belonged to Dakota or Sioux nation ceded land of Illinois to U.S.,  Sacs (Keokuk) ceded Illinois and moved to Iowa

Source: Past and Present of the City of Rockford and Winnebago County 977.33 C471p

location boiled maple sap east of Five Forks cabin

Rockordiana – Historic Houses and Landmarks – 1 & Rockford Morning Star 2/2/1899