It appears this isn't the Caroline Barnhart I'm looking for.
She was born ABT 1858 (I assume in Ohio - Washington or Monroe Co.) and died before 1921
She was the daughter of William Barnhart and Mary Johnson.(Her father being born ABT 1821 - OH I think, and died according to Mary's Obituary: William died, in 1857."Killed when in a fight on the Ohio River above Sistersville.He was struck on the back of the neck with an oar and died instantly.")
Other siblings were: William and Jasper (twins) b. 1845 Rebecca b. 1848 Mary Jane b. 1849 Elizabeth b. ABT 1853 Sylvester b. ABT 1854 Sarah E. b. ABT 1856 Caroline being the youngest (I believe she was born after her father died)-- I do not know if she married.
It is also said that William Barnhart (b. ABT 1821) had a father also named William.(I think this could be a first or middle name -- since many went by their middle names during this time frame.)