I was poking around looking for old Newsom information and stumbled upon this deed listed at the UK National Archives. It is listed as residing at the Lancashire Record Office; does anyone have access to the full record?
Robert Newsham of Woodplumpton, gent., and his son and heir, Richard Newsham, gent., to John Sherburne of Ribleton, gent., -- Woodplumpton QDD/24/m29 28 February 1614/15
There was a John Sherburne of Ribleton who was the son of Thomas Sherburne of Stonyhurst and Jane Townley. This John of Ribleton is the brother of the Richard Sherburne of Stonyhurst who m. Matilda Bold. Some Newsom researchers show Robert Newsom/Newsham's wife Elizabeth Sherburne as the daughter of Richard and Matilda (although I have not seen any evidence that he had a daughter named Elizabeth).