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- [S300] Josephine C. Frost, Ancestors of James Wickham and his wife Cora Prudence Billard. Includes bibliographical references and index. (Unknown publisher. 1935. 207 p), p. 147.
- [S300] Josephine C. Frost, Ancestors of James Wickham and his wife Cora Prudence Billard. Includes bibliographical references and index. (Unknown publisher. 1935. 207 p), p. 149.
- [S183] Rev. Jacob E. Mallmann, Historical papers on Shelter Island and its Presbyterian church, with genealogical tables ... /, p. 163.
Mahlman records eight children; does not record Ruth.
- [S695] , Josephine C. Frost, Ancestors of James Wickham and his wife Cora Prudence Billard. Includes bibliographical references and index. (Unknown publisher. 1935. 207 p) (N.p.: n.p., n.d.)., p. 149.
- [S696] , Rev. Jacob E. Mallmann, Historical papers on Shelter Island and its Presbyterian church, with genealogical tables ... / (N.p.: n.p., n.d.)., p. 163.
Mahlman records eight children; does not record Ruth.
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