I found the below which may be the source. However,this Sarah Stump's maiden name is Phipps.
https://phippsgenealogy.wordpress.com/2014/03/10/eastern-cherokee-application-of-charles-bayard-stump/
Charles Bayard Stump filed an Eastern Cherokee Application in 1906 from Smyth County, Virginia, based largely on his Phipps heritage. He was a grandson, he said, of William Phipps, born in Ashe County, North Carolina, and William’s wife Mary, who was born in adjacent Grayson County, Virginia.
This William was William W. Phipps, born 20 December 1841 according to the Eastern Cherokee Application of his brother Eli. He was, again, born in Ashe County according to the Eastern Cherokee Application (ECA) of William’s grandson Charles Stump.
The ECA of William’s brother Eli gives their parents’ names as Benjaman Phipps and Ruthy Hash. The ECA of Charles Stump only mentions Ruthy, but instead calls her Rutha Phipps, daughter of “Margrey hash.”
Charles Stump filed his claim for Cherokee benefits on the following basis: “Charles B. Stump a Son of Sarah J. Stump a Daughter of William Phipps a Son of Rutha Phipps a Daughter of Margrey hash a Daughter of James Hart who was a son of Dollie Sizmor [i.e. Sizemore] who was a Daughter of Ned Sizmor [i.e. Sizemore] who was a full Blood Cherokee Indian”