+--Horace Abercrombie 
Helen M. Abercrombie  (13 JUN 1855-)
|              +--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)
+--M. Lurette Morrison  (4 DEC 1833-)
   |  +--Consider Southworth 
   +--Myra Southworth  (3 NOV 1810-)