+--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 
+--George P. Morrison  (21 OCT 1848-)
|  +--Almira Lord 
Olive G. Morrison  (10 SEP 1877-)
+--Nellie S. Valentine