1a.  Anon.  1966.  Marriage Index:  Ohio, 1789-1850.  Liahona Research, Orem, UT (Broderbund CD-400):  not found.

1b.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org).

Peter KEMPER Spouse: Sarah CULP Marriage: 21 Aug 1834, Fairfield, Ohio Source: patron submission

2.  1840 Census Index and Digital Images (online at Ancestry.com; Image #15 of 24 — indexed "Henfer"; extracted by Diana Gale Matthiesen):•

1840

OH

Fairfield Co.

Walnut Twp.

p. 349B

Ln. 31

Kenfer/Kenper Peter

000 010 - 100 001

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	20-29	1810-1820	= Peter (b. 1811/12)
1 female	4 or under	1835-1840	= Mariah (b. 1838/9)
1 female	30-39	1800-1810	= Sarah (b. 1809)

This enumerator had a small, tight hand, with lower case letters reduced to "bumps," so Peter's surname is not readable with certainty; however, the list was roughly alphabetized and this record was with the "K's," so there's no excuse for the indexer reading this as "Henfer."

3.  1850 Census Index/Images (online at Ancestry.com; Image #20 of 51):  Walnut Twp., Fairfield Co., OH, p. 206B, 1113/1113, enumerated 30 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):•

Kemper Peter	38	M		Farmer		Va
"   Sarah	41	F				O
"   Mariah	11	F				"
"   Elias	9	M				"
"   Simon	7	M				"
"   Martha	5	F				"
"   Rachel	3	F				"
"   Ezra	7/12	M				"
Culp Jesse	32	M		Laborer		"
"  Mary Jane	4	F				"

Jesse CULP is Sarah (CUPP) KEMPER's brother.  It appears Jesse is a widower and Mary Jane is his daughter.  Listed three households from Sarah's brother, David CULP.