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

2.  1850 Census:  Allen Twp., Union Co., OH, Roll 736 (Book 1), pp. 104B-105A, 1396/1414, enumerated 23 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Henry Dunham	30	M		Carpenter	200	Ohio
Sarah M  "	23	F				NY
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Luther S Dunham	6	M				Ohio
Arthur D   "	4	M				"

3.  1860 Census Index/Images (online at Genealogy.com, Image #8 of 11):  Medaryville P.O., Cass Twp., Pulaski Co., IN, Roll 290 (Book 1), p. 1031, PN 89, 644/644, enumerated 26 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Henry Dunham	41	M		Carpenter	200	140	Ohio
Sarah M Dunham	33	F					NY
Luther S    "	15	M					Ohio
Asker/Osker "	14	M					"
Janett      "	6	F					"
John A      "	4	M					Ind

4.  1870 Census Index/Images (online at Genealogy.com, Image #35 of 58):  Bremen P.O., German Twp., Marshall Co., IN, Roll 342 (Book 1), p. 115A, PN 36, 3/3, enumerated 10 Aug 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Dunham Henry	50	M	W	Farmer	400	?00	Ohio
"   Mariah	43	F	W	Keeping House			"
"   Luther	25	M	W				"
"   Oscar	23	M	W				"
"   Abby A	16	F	W				"
"   John	14	M	W				Indiana

5a.  1880 Census (indexed at FamilySearch.org; page image online at Ancestry.com, Image #31 of 58):  Village of Petoskey, Emmet Co., MI, Roll T9-0578, p. 346C, PN 31, SD 3, ED 59, enumerated 12 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen):

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
1	2	3	4	5	6	8	10	13	24	25	26
260	248	Dunham Henry	W	M	60		/	Carpenter & Joiner	Ohio	Mass	Mass
		______ Sarah M	W	F	53	Wife	/	Keeping House	NY	NY	NY

5b.  1880 Census (indexed at FamilySearch.org; page image online at Ancestry.com, Image #1 of 58):  Petoskey Village, Emmet Co., MI, Roll T9-0578, p. 331A, PN 1, SD 3, ED 59, enumerated 1 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen):

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
1	2	3	4	5	6	8	9	13	24	25	26
1	1	Dunham John A	W	M	24	Servant	/	Porter in Hotel	IN	OH	NY

Living in hotel (others not extracted).

6.  U.S. Dept. of the Interior, Bureau of Land Management. The Official Land Patent Records Office.

Date	Cert. No.	Land Office	Patented By	Acres	Aliquot Sec.Twp.Rng	Meridian	State	County*
10 Dec 1877	2918	Traverse City, MI	Henry Dunham	169	NW¼ S8.T34N.R4W	Michigan- Toledo Strip	MI	Emmet
*The county is not given on the original certificate, which describes the location of the land solely in terms of Aliquot, Section, Township, and Range.  The county names must have been added to the database at some later time, probably when the certificate data were computerized.