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- [S255] Donnelly Thomas H., A Genealogy of the Family of Richard Howell of Mattituck, Southold Town, Long Island, New York, to seven generations (Bowie, MD: Heritage Books, circa 2000)., p. 116.
A Genealogy of the Family of Richard Howell of Mattituck, Southold Town, Long Island, New York, to seven generations, Donnelly, Thomas H., Richard Howell, (Heritage Books, Inc., 2000).
- [S125] Ancestry.com. 1800 United States Federal Census [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2009. Images reproduced by FamilySearch. Original data: Second Census of the United States, 1800; (National Archives Microfilm Publicat, Census Place: Brookhaven, Suffolk, New York; Roll: 27; Page: 6; Image: 129; Family History Library Film: 193715.
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