Hello marp,
Good to hear from you again. It is an auspicious day for me, my birthday and the "birthday" of Burlington County, New Jersey(in 1694), which my Foulks ancestors were English pioneers of, and so it is a doubly special day for me. Now that I have found this website again, I intend to post more often.
I still live in Burlington County, and have never been to England. You sound as though you live around the area where our ancestors were, are you in Derbyshire, by any chance? I have never found a baptismal record for Thomas Fowke, either. I don't think we will find their births in Quaker records, as the Quakers were not in existence until about the middle of the 17th century. The best bet would be the Church of England parish registers from 1538 on, I would think.
The website that I use, and that has a lot of information on my ancestor Thomas Foulke, is the "Janet and Robert Wolfe Genealogy" site. Robert is also a descendant of Thomas, and lives in Michigan with his wife Janet. One of the entries on the page for Thomas and his wife Mary, in 1682, states that Thomas conveyed land in England to Thomas Hopkinson of Holmgate. For me, this is another clue to his relationship to the Hopkinson family, for, as you know, Matthew, the father of Thomas, was dead by this time. Thomas Foulke was not returning to England, and so was disposing of his property to his nearest kin there, his nephew Thomas Hopkinson. It makes perfect sense to me, anyway.
You provided me with another clue in your last post. You mentioned that John Curtis was a witness to the will of Matthew Hopkinson. If this is the Quaker John Curtis (1635-1696) living at the Ford estate in Derbyshire with wife Anne (Revell) Curtis and children, he will shortly also be coming to Burlington County, and become the father-in-law of Thomas Foulke Jr., who grows up to marry his daughter Elizabeth, and also become my ancestors. In Joseph Besse's, "A Collection of the Suffering of the People Called Quakers", Vol. 1, page 140, for the year 1668, in the same paragraph it is mentioned that Thomas Fowkes and his wife, John Curtis, and others, were all excommunicated for "absence from the public worship". This indicates to me that the Fouke, Hopkinson, and Curtis families were acquainted with each other in Derbyshire, on account of their faith at least. I really think that we are on to something here, and that we may be distant cousins of each other.