Thomas and Margit Pearce , early 1700's, England

I am seeking information concerning a Thomas and Margit Pearce who were married 11-2-1718 in Illogan, Cornwall, England.My great grandparents 7 generations removed bore these names and lived in Newtown, CT in the years from 1733 until their deaths. I have reason to believe that they may have immigrated from England and this is the reason for my inquiry. Does anyone have information concerning Thomas and Margit Pearce who were married in Illogan, Cornwall, England 11-2-1718?I would like to know the names of Thomas' father and mother, Margit's if possible, any knowledge of their year of immigration to America and, lastly, any realitives of this couple who may have remained in England.Thank you for any information you may be able to provide.Burnard