Hi Andy!
Thank you for posting your connection to the Graham family. Your great x 5 grandfather was the clincher for me in my search. Seeing his name as the witness to Robert and Eleanor's wedding and then married to Mary, Robert's sister provided me the "missing link" I needed.
I assume you saw my posting providing Mary's date of birth. The parish registers that Helen K and JenB showed me turned out to be very valuable resources. Good luck in your research.
Regards,
Michael.