Todd, Thanks for your very important message regarding Baldwin. Unfortunately the internet makes it super easy for fanciful thinking to perpetuate bad information and hearsay. I sometimes wonder whether researchers online have ever even heard of NEHGS or similar societies.
Regarding Sylvester Baldwin (d at sea 1638), I believe that CC Baldwin's supplement (1889) takes back the statement that Sylvester's wife was a BRYAN. Her identify is, so far as I know, unknown.