Progress has been slow but I have managed to find a small link between my ancestors and your own.
John and Maria KEMPSTER's son George married Sarah Elizabeth ROBERTS.Another son Joseph married Hannah Roberts. whose daughter Harriet ROBERTS had a child Matilda before her marriage to Joseph KING. Matilda (Roberts) KING had several children.Their second son William KEMPSTER was my great grandfather, their younger son Joseph George KEMPSTER was the grandfather of Norma McGlashan who lives in Western Australia.
I can give you more details on these folk if you are interested.