Hi
I have Eliza Amanda Hartzog (1847-1902), daughter of James Franklin Hartzog and Eliza Newsom, married to Joe Jayne Parker in 1883. Is this your g-grandmother? The only reference I have for Joe Parker is in the Directory of Deceased American Physicians 1804-1929. It gives his birthdate as 21 Jan 1844 in Brandon MS, death date as 9 Nov 1925 in Prentiss MS. Hope this helps.
Genie