+--Davenport Alger 
John D. Alger  (17 AUG 1814-)
|        +--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)
+--Mary Morrison  (14 MAR 1783-27 OCT 1854)
   +--Mary Roach  (WFT Est 1736-1760-WFT Est 1779-1849)