1a.  Anon.  1966.  Marriage Index:  Ohio, 1789-1850.  Liahona Research, Orem, UT (Broderbund CD-400):

Eli, Jacob

Bussinburgh, Lucinda

Feb 25, 1817

Coshocton Co.

1b.  Database to an Index of Indiana Marriages through 1850.  Indiana State Library, Genealogy Division, Indianapolis, IN.

Last Name	First Name	Last Name, Spouse	First Name, Spouse	County	Date
Parks	Jackson	Eley	Mary	Jay	21 Nov 1839
Eley	John	Strader	Ruth	Jay	8 Nov 1842
Eley	Hugh	Bickel	Sarah	Jay	15 Oct 1847
Eley	Peter	Williams	Lydia	Jay	17 Feb 1848
Athey or Hathaway	James	Eley	Marthy	Jay	23 Aug 1849

2.  Census Index:  U.S. Selected Counties, 1820 (Broderbund CD-314):

1820

Ely, John

OH

Coshocton Co.

Newcastle

p. 25

Jacob and his wife appear to be living with Jacob's father, John ELY (John is the only ELY in the county).

3.  1830 Census Index and Digital Images (online at Ancestry.com; Image #5 of 10; extracted by Diana Gale Matthiesen):

1830

OH

Knox Co.

Jackson Twp.

p. 213

Ln. 3

Ely Jacob

320 001 - 110 010

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
3 males	4 or under	1825-1830	= Aaron (b. 1829) = Son A = Peter (b. 1825/6)
2 males	5-9	1820-1825	= Hugh (b. 1822/3) = John (b. 1820)
1 male	30-39	1790-1800	= Jacob (b. 1796)
1 female	4 or under	1825-1830	= Daughter B
1 female	5-9	1820-1825	= Daughter A
1 female	20-29	1800-1810	= Lovina (b. 1797/8)

Jacob and his father, John ELY, are the only ELYs in the county.  List was roughly alphabetized, no so neighborhood reconstruction is possible.

4.  1840

.  1850 Census Index/Microfilm (online at GenealogyLibrary.com):  Madison Twp., Jay Co., IN, p. 305A, 110/110, enumerated 2/4 Sep 1850 (extracted by Diana Gale Matthiesen):

Jacob Eley	56	M	Farming	800	Pa
Lavina   "	52	F			"
Aaron    "	20	M			Ohio
Michael  "	17	M			"
Philip   "	16	M			"
Elizabeth "	14	F			"
Catharine "	12	F			"

.  1860 Census Images (online at Ancestry.com; Image #25 of 293):  Salamonie P.O., Madison Twp., Jay Co., IN, p. 25, PN 25, 190/190, enumerated 15 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Philip Eley	26	M		Farmer		350	Ohio
Mary M  "	25	F					"
Jacob Eley	66	M		Ret Farmer	1500	75	"
Lovina  "	62	F
Isaac Ludy	10	M

Listed five households from son, Michael ELEY, who is next to son, Aaron ELEY.