History Of Oak Forest Hospital and surrounding land

I have lived in Tiney Park for 60 years.  I once had an Aunt that lived (?) in the Oak forest Infirmary (aka Oak Forest Hospital) untiil her passing in 1967.  I am trying to find information, perhaps a book, on the history of this property, hospital, infirmary, the Indians that once lived on the property, cemeterys, the recent news of thousands of bodies buried, unmarked east of the hospital buildings. If you know of any sources, please let me know.  I have gotten some info googling, but not all the info I really want.  I want to study the history of this property.... HELP IF YOU CAN!