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- [S4574] will / Costin, Francis [1750], Northampton Co, VA.
- [S2712] Samuel Costin et al v. Thomas Widgeon et al, chancery suit (1801). Northampton Co, VA.
- [S256] James Handley Marshall, compiler, Marshall, Abstracts of the Wills and Administrations of Northampton County, Virginia 1632 - 1802, ((Camden, ME: Picton Press, 1994)), ISBN 0-89725-163-6.
p. 544: Abraham Costen, Sr. estate administration
- [S3182] property survey / Costin, Abraham, Northampton Co,.
- [S256] James Handley Marshall, compiler, Marshall, Abstracts of the Wills and Administrations of Northampton County, Virginia 1632 - 1802, ((Camden, ME: Picton Press, 1994)), ISBN 0-89725-163-6.
p. 429: William Griffith will.
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