Nancy Caroline BURGESS md ?? SANDERS in TN

I am trying to identify which SANDERS was married to Nancy Caroline BURGESS - probably around the mid 1870's in the area of Marshall/Giles Counties in TN.

Nancy md (2) to Wesley GRIFFIS 1895 in Marshall Co, TN as his 2nd wife, and had 2 GRIFFIS children. The 1910 census indicates Nancy was the mother of 5 children, so the first 3 must have been SANDERS children.

I found a James SANDERS md to a Nancy of the right age in the 1880 census in Giles County. Is this the right couple?They have 3 children, so it fits so far.

Any help appreciated.