Margaret A Best

She diedon april 11th 1872 in Mclean County according to all sources. I cannot find out where she is buried, if she had an obit or a will, and from what I have learned of her it would not surprise me if she left a will. Last question her youngest child was nmaed Martha B Born cal 1851. After 1860 census I cannot find any trace of her. can anyone help. Thanks ever so much
Yesca_L@yahoo.com