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

Green, Elijah

Conn, Mary

7 Dec 1846

Hancock Co.

2.  1850 Census Images (online at Ancestry.com; Image #111 of 185):  Columbus Grove, Pleasant Twp., Dist. No. 118, Putnam Co., OH, p. 56A, 75/75, enumerated 15 Aug 1850 (extracted by Diana Gale Matthiesen):

E W Green	25	m	Merchant	550	O
Mary J  "	26	f			"
Wilson L "	2	m			"
Robert H W "	1	m			"
Margaret   "	18	f			"
Henry      "	60	m	None		Pa

Henry is Elijah's father and Margaret is Elijah's sister.

3.  1860 Census.

4.  1870 Census Images (online at Ancestry.com; Image #26 of 36):  Columbus Grove P.O., Pleasant Twp., Putnam Co., p. 440A, PN 25, 178/179, enumerated 22 Jul 1870 (extracted by Diana Gale Matthiesen):

Green Elijah W	44	M	W	Farmer	1800	510	Ohio
Mary	47	F	W	Housekeeper			"
Elizabeth	14	F	W	At home			"
Sarah	12	F	W	At home			"

Living next door to son, Wilson GREEN (æ 22, b. OH).

5.  Anon.  1896.  A Portrait and Biographical Record of Allen and Putnam Counties, Ohio (reprinted 1984 by Whipporwill Publ., Evansville, IN; excerpt courtesy of Debbie Ritzenthaler).

Elijah W. Greene, one of the most successful farmers and prominent citizens of Pleasant township, Putnam county, is a native of Ohio, and was born in Licking county, August 13, 1826.  He is a son of Henry and Charlotta (Corbin) Greene, both of whom were natives of Huntingdon county, Pa.  The parents were married in Pennsylvania and with their four children came to Ohio in 1825, locating in Licking county.  In the spring of 1833, they removed to Hardin county, and in 1834 to Hancock county, where the mother died in 1836, in about her fortieth year, he dying in Columbus Grove, having spent the fourteen years preceding his death with his son, Elijah W.  Both parents were members of the Methodist church.  To them ten children were born, only two of whom are now living.  The children were as follows: Sarah, who married Coleman and died in Hancock county, Ohio, leaving two children; Ellenor married Thomas Bates and died on the Osage river, in Missouri, leaving two children; Allison, now a farmer, residing about three miles east of Columbus Grove, in Pleasant township, Putnam county, Ohio; Elijah W., our subject; James, Davis, Allen, Iontha and Charlotte, who died in childhood, and Margaret, who married Cooper McComb, of Pleasant township, and died, leaving four children.

Elijah doesn't mention his own wife and children!  Were they all dead by 1896?