family from Lucius Weaver's History and Genealogy of a Branch of the Weavers
from http://www.joycetice.com/kelsey/kjjg.htm (and the 1840 Census, Arkwright, NY):
daughter b. 1826-30.
Lucy Lafferty b. 21 Apr 1830 m. 21 Apr 1857 Paul Perham and she d. 18 Apr 1891 Dayton, New York.
daughter b. 1831-35.
daughter b. 1831-35.
son b. 1836-40.
cannot confirm the story about John dying on the Oregon Trail. Instead, Hannah disappears and this family shows up in Butler, Branch Co, MI 1850:
John Lafferty 47 ( not found for this age in any other census; 1803 is prob wrong)
Betsey Lafferty 22
Hiram Lafferty 12
Emeline Lafferty 8
==> coincidentally this is next to Hillsdale Co, MI where Alzina married.