Great! The cover is important for the date (year and between month a and month b). The other is the info .. which matched with your Walter where it says "son of blah". I've no idea how you would cite that humongous link; but that's now in your hands.
There may be a way of using that type of reference to find your missing last name. (Which was what I was trying for.) I did find another similar book, but it covers YEARS and YEARS.
Edit to add: "The Registers of the Abbey Church of SS. Peter and Paul, Bath, Volume 28
By Bath, England. Abbey church of SS. Peter and Paul"