Joyce, Sorry about the delay in replying to your mail of the 7th. Genealogy has been low on my priority mail reply list this month but I am slowly coming back on line !! I have had the same problem identifying Robert b.1644/5 parentage but have recently received from the Josselin Society, of which I am a member, "Descendant of Joseph Joscelyne b. abt 1682". I have only skipped over the tree as yet but it certainly opens up some fresh trails that could possibly solve the missing parents. Will let you know more in due course.
You apparently have got back to Gilbert and the Hide Hall family. Having seen my 1644 up to today on the site did we not cross over somewhere. Ever been in contact with Shirley Toughover there ?Drop her a line onSATOUGH@aol.com with my regards, she may have your line in her extensive range of Joslin type history.