Wilma, My record shows two sources for the 10/10/1642 birth date of John(2). Harriet Augusta Robinson, "Brewer Genealogy" (1903 Document provided by Mary Marshall Brewer (MBREWER@aol.com)12/2/1996 to Robert Collman and James Savage, "A Genealogical Dictionary of the First Settler of New England", 1860-62) : Genealogical Publishing Co., 1990.
Hopes this helps.
I also show that John Brewer(1) had two wives Anne Skinner(m 1641 Cambridge according to Goble sources) and Mary Whitmore (m no date but with James Savage as source.)Not sure about either one of these as being the definative work.