+--Jacob K. Davis 
Arthru L. Davis  (1865-)
|              +--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)
|     +--James R Morrison  (22 Mar 1781-15 OCT 1841)
|     |  +--Mary Roach  (WFT Est 1736-1760-WFT Est 1779-1849)
|  +--John Morrison  (10 SEP 1803-8 AUG 1837)
|  |  +--Martha Polton  (11 Aug 1783-14 JUL 1870)
+--Clara Morrison  (1832-)
   +--Mehitable Tibbetts