+--John Morison  (1628-16 FEB 1736)
            +--John Morison  (1678-14 JUN 1776)
            |  +--Wife One 
         +--Thomas Morison  (1710-23 NOV 1797)
         |  +--Margaret Wallace  (1687-18 APR 1769)
      +--Robert Morison  (29 NOV 1744-13 FEB 1826)
      |  +--Mary Smith  (1712-29 DEC 1799)
   +--Robert Morison  (8 MAY 1784-25 APR 1861)
   |  +--Elizabeth Holmes  (23 JUN 1754-17 MAY 1808)
+--Nathaniel Morison  (6 MAY 1812-)
|  |  +--Josiah C. Spring 
|  +--Betsey Spring  (28 JUN 1787-)
Edgar David Morison  (17 JAN 1842-16 AUG 1843)
+--Mary Knight  (18 OCT 1815-)