... A recent mitochondrial DNA test of descendants of daughters of Joseph Hanks, daughters of Lucy Hanks Sparrow, and two Shipley sisters show a match between Hanks and Sparrow and no match to the Shipleys, making it certain Nancy Hanks is the illegitimate daughter of Lucy Hanks, and that Lucy is the daughter of [Mrs.] Ann "Nanny" Lee Hanks.[4] ...
[4] "NANCY HANKS LINCOLN mtDNA STUDY". [1]