+--John Morison  (1628-16 FEB 1736)
            +--James Morison  (1675-15 MAR 1756)
            |  +--Wife One 
         +--Samuel Morison  (1704-11 FEB 1776)
         |  +--Mary Wallace 
      +--Robert Morrison  (6 FEB 1758-APR 1808)
      |  |  +--Samuel Alison 
      |  +--Martha Alison  (31 MAR 1720-3 DEC 1761)
   +--Alva Morrison  (13 MAY 1806-28 MAY 1879)
   |  +--Eunice Dow  (20 OCT 1770-7 FEB 1854)
+--Alva S. Morrison  (9 NOV 1835-)
|  |  +--Consider Southworth 
|  +--Myra Southworth  (3 NOV 1810-)
Grace Curtis Morrison  (30 DEC 1870-27 SEP 1872)
+--Lizzie A. Curtis  (-7 JAN 1874)