+--Robert Morrison 
   +--William Morrison  (30 NOV 1726-28 FEB 1778)
   |  +-- Elizabeth 
+--Robert Morrison  (JAN 1747-10 JUN 1802)
|  +--Jane Rogers  (-AFT 1794)
James Morrison  (1 MAR 1784-29 SEP 1844)
|  +--Adonijah Luce 
+--Catherine Luce  (27 OCT 1747-)
   +--Abigail Athorn