Joseph was born about 1744 somewhere around Martha's Vineyard, Dukes, Massachusetts and died June 21, 1816 in Moscow, Somerset, Maine. He married Dorcas Smith on February 16, 1879,  daughter of Thomas Smith and Elizabeth Bassett.
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Dr. Charles E. Banks, History of Martha's Vineyard, Vol.III, The Smith Family, No. II, (Originally published 1911), p.451, (See note for Thomas Smith.).
GenealogyLibrary.com, Tisbury Vital Records - Tisbury Marriages to the Year 1850, (New England Historic Genealogical Society. Boston. 1910), p.112, BAKER, Joseph and Dorca Smith, Feb. 16, 1769. (*)(*) Intenttion not recorded.