Hubby's g-grandparents (Edward George Steiner and Elizabeth Jane Rinehart Steiner) had 7 living children (not counting the newborn who died and Elveretta, who died in early childhood). I think that Brice Larimer McClure, who married Floyda Steiner, kept this handwritten listing of his wife's family's births and deaths.
Margaret Steiner Post, b. 28 July 1861 and d. 3 Feb 1913. She's buried in Old Mission Cemetery, Upper Sandusky, Wyandot County, Ohio, in Sec E, lot 29. Right next to her is Elroy D. Post, b. 29 June 1859 and d. 2 July 1929. Many other Steiner relatives are buried in this cemetery, as well, and I even have the deed for Brice Larimer McClure's plot.
Margaret Steiner Post doesn't appear in any of the Ohio death records, so I strongly suspect she died in Knoxville, where she and Elroy lived (according to the 1900 and 1910 Census notes). Just my luck, Tennessee required statewide recording of deaths up until 1912 and from 1914 on, but NOT in 1913.
After a discussion with a research librarian at the Knoxville Public Library, I'm sending info to them to request a lookup of an obit on great-aunt Maggie or, if available, a death cert from Knox county. To hedge my bets, I'm also going to ask the Upper Sandusky library to do an obit lookup. Fingers crossed!**