David,
In the Croxton transcripts, a burial on 13th May 1687 for an Edward COZYN, farmer...
A baptism on 31-07-1655 for an Edward COSIN, son of Edward and Jeane.
and on from the phonetically challenging COZENS/COZYN/COSIN to Gamlingay:
a baptism on 03-03-1700 for a John HALE, son of John and Mary. Underneath it gave "gp" (presumably godparents, rather than grandparents): John ATKINS, John PEET, Eliz Barret (?), Mary EDWARDS.
Baptism: 20-02-1702: Richard and Thomas HALE, twin children of Will (sic)
Baptism: 25-02-1704: William HALE, son of John and Mary...
Very obliging of that vicar to pop in the names of godparents too...
Regards, keith
p.s. just noticed that it was Mary Barrett's baptism you wanted looking up, not Edward's. Next time!