Have you tried to find death certificates and obituaries?Anna's death date and place are listed below.
RootsWeb Family Trees:Daniel W. HINCKLEY, b. ca. 1812, NY, was of Boston, Summit Co., OH, census of 1850:
Daniel W. HINKLEY, 38, shoemaker, NY Elizabeth J., 22, OH[d. 1914, Oberlin, OH] Aetravius, b, OH Harriet, 3, OH Wm., 3/12, OH. ____ Anna Mae HINCKLEY (19 Aug. 1856, Pittsfield, OH - 16 Jan. 1929, Omaha, Douglas Co., NE) m1. Henry E. ROOT.In 1880, they were of Avon, Lorain, OH:Henry E. ROOT, 23, OH OH OH; wf. Ann M., 23, OH NY OH; son Carlton H., 2, OH; dau. Florence M., 10 mos., OH.