Weis, Frederick Lewis. Ancestral Roots of Certain American Colonists Who Came to America Before 1700. Baltimore, MD, USA: Genealogical Publishing Co., 2004. Online: Ancestry.com. Ancestral Roots of Certain American Colonists Who Came to America Before 1700 [database on-line]. Provo, UT, USA: The Generations Network, Inc., 2006.
There is no reference to Elizabeth Clerke Foster in Richardson's Magna Carta Ancestry: A Study in Colonial and Medieval Families, 2nd Edition . The other children are listed. Perhaps she should be removed from this family list.