Lee Ann,
Nancy Elizabeth Detty married to John Gragg in 1866 is the sister of my GG-Grandfather, John Washington DETTY. She would be the daughter of John Henry and Mary Elizabeth Burks Detty. Most of John Henry's family moved west to Missouri, Nebraska, and points beyond after the Civil War. Nancy is listed with John Henry and family in an 1850 census that I think you posted several years ago on this site.
I think Nancy's sister Louisa was married to Gideon Crabtree after Cauzanda died. (Louisa was listed as Lina and several other names in the old records.) I believe that Louisa and Cassie were first cousins, but have never been able to prove it. Let me look some things up and post more on this later.
Hope this helps.
Kathy