+--George H. Richards 
Herbert Wilder Richards 
|        +--Joshua Merrill 
|     +--Abraham Dow Merrill  (7 MAR 1796-29 APR 1878)
|  +--Joshua Merrill  (1828-)
|  |  |           +--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)
|  |  +--Nancy Morrison  (17 AUG 1796-29 JAN 1860)
|  |     +--Eunice Dow  (20 OCT 1770-7 FEB 1854)
+--Isabella Morrison Merrill  (10 APR 1850-)
   +--Amelia S. Grigg  (25 DEC 1830-)