RC Anderson has an extensive sketch of James Matthews in The Great Migration, Vol. 5, pp. 90-95. His man died in Barnstable in 1684-5, and his last three children were Sarah, Esther, and Mehitable, so it seems that Mathews-192 is the same man. But some other life details differ. I have a copy of that book, and will attempt to improve the profile accordingly.
And he is clearly PGM.