I found this family in the following census records.
Note: 1870 census below
It appears Stephen and Elizabeth are living with Stephen's mother Clarrissa and his younger siblings.
E. W. may have been William E. Nations.Possibly William Edward Nations, as this would include the first names of both grandfathers.
--- Stephen C. Nations, son of William Anderson Nations and Clarissa M. Murphee, was born 1846 in Arkansas. He married Elizabeth Mills 1886 in Gonzales, Texas. She was the daughter of Edward Lancaster MILLS and Elizabeth TURNER. She was born 1846 in Gonzales, Texas. He married Elizabeth Pullen 1874 in Gonzales, Texas. She was born 1846 in Gonzales, Texas.