From the Flint Daily Journal published Tuesday, March 5, 1912 (Page Ten):
Metamora [Lapeer County, Michigan]
Metamora, Mich., March 5. ----Mrs. Moore, formerly of Thornville, who died at the home of her daughter, Mrs. William Powers of South Attica, was buried at Thornville Sunday. Mr. Moore was sheriff of Lapeer county several years ago.--
See another blog post about Cynthia (Richmond) More here and another about her 2nd husband, Sylvester Marshall, here.
Newspaper obituary extract from the Genealogy Bank database.