+--Samuel Morison  (1671-29 SEP 1757)
            |  +--  
         +--John Morrison  (1721-1776)
         |  +--Margaret Henry  (1685-30 APR 1774)
      +--Samuel Morrison  (5 MAR 1751/52-1802)
      |  +--Elizabeth Alexander  (ABT 1721-ABT 1811)
   +--John Morrison  (17 OCT 1774-1848)
   |  +--Mary Roach  (WFT Est 1736-1760-WFT Est 1779-1849)
+--Ralph G. Morrison  (1811-)
|  +--Rachel Howard 
Mary A. Morrison  (13 OCT 1840-)
+--Almira Lord