+--Samuel Cowdry 
Elizabeth Cowdry  (16 DEC 1834-)
|  +--William Shirley  (-1807)
+--Mary Shirley  (9 NOV 1800-)
   |     +--Robert Morrison 
   |  +--William Morrison  (30 NOV 1726-28 FEB 1778)
   |  |  +-- Elizabeth 
   +--Mary Morrison  (1760-JUL 1843)
      +--Jane Rogers  (-AFT 1794)