Four pages. First page is a list of eight business addresses that were sent letters regarding the Illinois State Historical Society 1986 Centennial Business Program. May 27, 1986. The second page is a letter from Becky Littlefield of the Peoria Area Chamber of Commerce sent to 100-year old member firms regarding the Illinois State Historical Society Centennial Business Program. The thid page is a letter sent from the Illinois State Historical Society to businesses about the program. The fourth page is a Illinois State Historical Society Centennial Business Application.