Having just looked at the Newland burial register (not yet online) I have found the burial of a William Gwynne at Broadwell in 1834 which gives his age at deat as 65 years. Since the Ancestry records only gives the year of his birth I would conclude that the researcher has not found a baptismal record, they have just subtracted 65 from the year of death and assumed he was born at the same place.