Thanks Mary Jane! I do show a son of Peter Cook (1674 - 1713) named Thomas Cook: Thomas Cook (b. 29 Aug 1704, Norwich, Cheshire, England d. 1751, York Co. PA) married Mary Underwood (1710 - 1794) 28 Jul 1730 London Grove MH, Chester Co. PA. Is this the Thomas and Mary Cook who you are looking? Mike Cooke