I know you posted this a couple of years ago and I hope this can reach you now. I have written a comprehensive story about Mary Ann Stilwell Miller Pearce which can be found in the Miller Weber Schaf Kessler family Tree on Ancestry.com. If you are not a member, please email me at firstname.lastname@example.org. Mary Ann's story is one of courage, sadness and finally a level of peace once she reached Illinois. She was my great-great-great grandmother. And yes, I do believe she was part Native American. However, her husband, Jacob Miller, was not.