+--Silas Betton 
Mary Jane Betton 
|     +--James Thornton 
|  +--Mathew Thornton  (1714-24 JUN 1803)
+--Mary Thornton 
   |  +--Andrew Jack  (-1773)
   +--Hannah Jack 
      |  +--John Morison  (1628-16 FEB 1736)
      +--Mary Morison  (1718-)
         +--Jeanette Steele