+--Robert Morrison 
         +--William Morrison  (30 NOV 1726-28 FEB 1778)
         |  +-- Elizabeth 
      +--Robert Morrison  (JAN 1747-10 JUN 1802)
      |  +--Jane Rogers  (-AFT 1794)
   +--William Morrison  (9 APR 1788-26 JUN 1873)
   |  |  +--Adonijah Luce 
   |  +--Catherine Luce  (27 OCT 1747-)
   |     +--Abigail Athorn 
+--William Morrison  (26 NOV 1814-15 JAN 1863)
|  |  +--Francis Cabot 
|  +--Mary Cabot  (2 APR 1789-4 OCT 1841)
|     +--Marcia Hodgman 
Mary Morrison  (30 JUN 1851-30 NOV 1874)
|  +--Harper Sears 
+--Lucy Sears 
   +--Susan Churchill