Paul,

Is this the same John "Graweere" (who possibly arrived on either the Treasurer or White Lion in 1619) and worked on the College Plantation owned by William Evans, that Tim Hanshaw talks about in his book the Birth of Black America. Hanshaw writes "About 1635, John Graweere and Margaret had a son who was considered a slave of Robert Shepherd, like his mother...

Hanshaw calls her Margaret Cornish....then states ..."she too was one of the Bautista Africans and noted in the Jamestown census of 1625 simply as "Margaret"......

He also writes that John Graweere attempted to purchase her freedom and that of their son......but Margaret begins a long time affair with a white man Robert Sweet and has 3 other children. John Graweere in 1641 buys the freedom of his son, in Surry County, VA.
Doesn't appear that the son is named in the court records when he purchases his freedom, but Hanson surmises that this son is Mihill Gowen.

Martha W. McCartney in her new book Virginia immigrants and Adventurers 1607 to 1635 includes:

Margaret
On February 16, 1624, an AFrican named Margaret was living at Warresqueak the Bennett plantation (CBE:42)

Selma