The maternal relationship between Sarah Jane Robinson and her son
Edgar L Watson is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant MW.
The segmental (via DNA segment triangulation) and total DNA shared between MW and other confirmed descendants of
Preston S. Robinson/
Jane H. Jackson is consistent with the expected ranges for their respective relationships. Since MW descends from Preston S. Robinson/Jane H. Jackson through Sarah Jane Robinson and her son Edgar L Watson, the presence of significant shared DNA between MW and other known descendants of Preston S. Robinson/Jane H. Jackson validates the generational links along this maternal line.
This supports the conclusion that DNA was passed from MRCA couple Preston S. Robinson/Jane H. Jackson through Sarah Jane Robinson to Edgar L Watson, and ultimately to MW, confirming this direct ancestral connection through multiple generations.