+--John S. Whittaker 
Horace T. Whittaker  (31 MAY 1851-)
|              +--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)
|  +--Ira Morrison  (18 JUL 1798-10 MAR 1870)
|  |  +--Eunice Dow  (20 OCT 1770-7 FEB 1854)
+--Catharine Colby Morrison  (10 JAN 1825-)
   +--Sophia Colby  (3 MAR 1801-)