1.  LDS.  Family Search: Internet Genealogy Service: International Genealogical Index (IGI).

Christian HORN Spouse: Sarah Marie NICHOLS Marriage: 4 Nov 1847, Knox, Ohio Source: patron submission

2.  NARA.  1964.  Population Schedules of the Seventh Census of the United States, 1850, Roll 700, Ohio, Knox County.  Microcopy No. 432.  National Archives Microfilm Publications, Washington, DC.  Family Quest Archives:  Ohio Federal Census 1850: Knox County.  Heritage Quest CD M432-700:  Jackson Twp., Knox Co., OH, p. 379B, 2211/2268, enumerated 16 Sep 1850 (extracted by Diana Gale Matthiesen):

Christian Horn	25	M	Farmer		Ohio
Sarah M    "	22	F			Va
Margaret   "	2	F			Ohio
William    "	4/12	M			do
Lewis Paterson	62	M	Farmer	1800	Va
Mary    "	60	F			do
Hezekiah Patterson	23	M	Farmer		Va
Elizabeth   "	18	F			do
Catherine   "	16	F			Ohio

Ordinarily, I would have pegged the Lewis & Mary PATTERSON as Sarah's parents, but apparently they are not.