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- [S2304] Ancestors of American Presidents by Gary Boyd Roberts. 2009 edition, 2012 reprint with 2015 corrigenda. Boston: New England Historic Genealogical Society, 2015.
- [S6026] Early New England People: Some Account of the Ellis, Pemberton, Willard, Prescott, Titcomb, Sewall and Longfellow, and Allied Families by Sarah Elizabeth Titcomb. Boston: W. B. Clarke & Carruth, 1882.
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