I,too, have that Nancy Eastin Davis died at the home of Minor Murry Stephens. He lived in Heard Co.,GA which is next to Coweta Co., GA where the Davis Cemetery is located (about 2 miles east of Newnan, GA; begun by her son Jeptha Vining Davis). Minor lived at one time in Enon Grove (now extinct except for cemetery and a few homes)in Heard Co. I guess about 15 miles from the Davis Cemetery.
My records do not show her in the Davis Cemetery. They show that both Talitha and Minor Murry Stephens are buried in the Stallings Cemetery in Coweta Co. If Nancy was buried next to Talitha, she is buried there, but not listed in the list of Davis and relations buried in Georgia that I have. There is also Elim Baptist Church cemetery in western Coweta Co. (between Enon Grove and Newnan). Her son William was minister there for a brief period in 1862. Some Davises are also buried there, but no indication of Nancy.