Lydia M. & Harriet C. JONES of MS
Lydia M. JONES b. abt 1834 and Harriet C. JONES b. abt 1838 were counted with their parents Alfred and Elizabeth JONES in the Lauderdale Co., MS census of 1850.
Alfred and Elizabeth and the younger children moved to St Helena Par., LA prior to the 1860 census.
I suspect Lydia and Harriet married and possibly stayed in MS.Could they be in your family?