In the Notice of Death filed by Joseph Hall for Henry Bowers on 28 May 1852, he stated that Henry's widow had also died sometime after the date of Henry's death and before the date of the notice. Thus, Mary probably died in May 1852.
1 1850 Census, Montgomery County, Indiana, Roll M432_161, Page 448 (Ancestry.com Image 4 of 15).
2 Henry Bowers, File 29 of Probate Records, Montgomery County, Indiana (copy provided by Kim Wainscott <firstname.lastname@example.org>, a genealogy researcher from Franklin, Indiana).
Grayson County, Virginia, Personal Property Tax Books, 1794-1807, 1809-1850, FHL Film No. 2,024,555. 1827 is the end of this reel of film.