The maternal relationship between Grace Elizabeth Harris and her son Elmer Harold Muxlow is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant JS.

The segmental (via DNA segment triangulation) and total DNA shared between JS and other confirmed descendants of John Thomas Shephard/Elizabeth Thompson is consistent with the expected ranges for their respective relationships. Since JS descends from John Thomas Shephard/Elizabeth Thompson through Grace Elizabeth Harris and her son Elmer Harold Muxlow, the presence of significant shared DNA between JS and other known descendants of John Thomas Shephard/Elizabeth Thompson validates the generational links along this maternal line.

This supports the conclusion that DNA was passed from MRCA couple John Thomas Shephard/Elizabeth Thompson through Grace Elizabeth Harris to Elmer Harold Muxlow, and ultimately to JS, confirming this direct ancestral connection through multiple generations.