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

Numan, Peter

Oberholtzer, Leah

10/14/1849

Holmes Co.

1b.  LDS.  Family Search: Internet Genealogy Service: Pedigree Resource File (index to CDs, online at FamilySearch.org).

Peter AUMAN Marriage:  14 Oct 1849, Holmes, OH Spouse: Leah OBERHOLTZER Birth: 29 Mar 1830; Place: Montgomery, Pennsylvania, USA Death: 13 Jun 1852; Place: Tuscarawas, Ohio, USA Father: Samuel OBERHOLTZER (1802-1880); Mother: Elizabeth SHULER (1802-1884) Source: patron submission

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

Peter AUMAN Spouse: Sarah BOLLMAN Marriage: 06 Mar 1853, Tuscarawas, Ohio Source: Marriage Records, 1808-1917. Ohio. Probate Court (Tuscarawas County)

Peter AUMAN Birth: About 1824, Mifflin, Pennsylvania Father: George AUMAN; Mother: Elizabeth HARRIS Source: patron submission

And more on the children of George AUMAN & Elizabeth HARRIS, but this is getting way too far afield for me.

1d.  Works Progress Administraton.  1938-40.  Index to Marriage Records: Indiana, 1800-1941 (online at Ancestry.com):

Peter Anman

Rebecca Livingston

27 Oct 1865

Owen Co., IN

Book 29, p. 184

2a.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #22 of 36):  Sugar Creek Twp., Tuscarawas Co., OH, Roll M432_734, p. 214B, 140/142, enumerated 3 Dec 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

George Auman	59	M		Farmer	700	Pa
Peter Auman	20	M		Carpenter		"
Leah    "	20	F				"

George is Peter's widowed father.  Listed next to Peter's brother, Jonathan AUMAN (æ 30, b. PA) and family.

2b.  1850 Census Every-Name-Index/Images (online at Ancestry.com):  Eli AUMAN (æ 7, b. OH) is living in Marion Twp., Owen Co., OH, with his parents, David AUMAN (æ 32, b. PA) & Sophia (æ 31, b. PA), plus siblings.

3.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #7 of 41):  Alligator P.O., Marion Twp., Owen Co., IN, Roll M653_287, p. 211, PN 35, 234/232, enumerated 14 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Peter Auman	30	M		Farmer	1400	500	Pa
Sarah   "	29	F		Domestic			Ohio
Abraham Bowlman	21	M		Day Laborer		300	"
Anna       "	18	F		Domestic		170	"
Eli Auman	17	M		Day Labor		30	"
Israel Harris	11	M					"
Lydia Auman	5	F					Ind

Abraham and Anna are Sarah's siblings.  Eli AUMAN is Peter's nephew.  Israel/Isaiah HARRIS is Sarah's half-brother.  I don't know Lydia AUMAN's relationship to Peter (if you do know, please share).

4.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #23 of 45):  Marion P.O., Marion Twp., Owen Co., IN, Roll M593_348, p. 292A, PN 23, 154/153, enumerated 24 Aug 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Orman Peter	44	M	W	Farmer	1800	600	Pennsylvania
_____ Rebecca	34	F	W	Keeping house			Pennsylvania
_____ Jonathan	9	M	W				Indiana
_____ Martha	8	F	W				Indiana
_____ Abraham	6	M	W				Indiana
Johnson Alonzo	8	M	W				Indiana
Orman Sophia	54	F	W	house keeper			Pennsylvania
_____ Lydia	15	F	W	without employ			Indiana

Jonathan, Martha, and Abraham are the children of Peter's second wife, Sarah (BOLLMAN) AUMAN.  Sophia ORMAN/AUMAN is the widow of David AUMAN (i.e., Peter's sister-in-law).  I haven't a clue where Alonzo JOHNSON fits in, nor Lydia, though she is probably Peter's niece.

8.  1880 Census Every-Name-Index/Images (online at Ancestry.com):  can't find, and I really looked.  Were they in transit?

9.  1890 Census:  the 1890 Census Population Schedules were destroyed.

10 .  1900 Census Every-Name-Index/Images (online at Ancestry.com):  Abraham AUMAN (b. Nov 1863, IN) is living in Spring Valley Twp., Cherokee Co., KS (p. 259B), with his family.  He appears to be the only one of the original family still in the county.

11.  William G. Cutler.  1883.  History of the State of Kansas.  A.T. Andreas, Chicago (online at "The Kansas Collection" web site):

Cherokee County... Baxter Springs... PETER AUMAN, farmer and stock-raiser, Section 20, P.O. Baxter Springs, was born in Mifflin County, Penn., in 1830, and was reared in Tuscarawas County, Ohio, to carpentering trade.  In 1852, he located in Owen County, Ind., and followed his business successfully there till 1880 when he located here and engaged at his present industry, which he has actively followed since.  He married miss Leah Overhaulser, his first wife, whom he buried in the cemetery in Tuscarawas County, Ohio, in 1850.  His second wife was Miss Sarah Bolman, whom he buried in the cemetery in Owen County, Ind., in 1865.  They had two sons and one daughter - Jonathan, Martha and Abraham.  His third wife was Miss Rebecca Livingston.  They have no children.  Mr. Auman did active service in Company F, Fifty-third Indiana Volunteer Infantry during the late civil war, from which he was honorably discharged.  His farm contains 160 acres of improved land, containing a nice orchard of 300 fruit trees of different kinds.

12.  Messages posted to the AUMAN Surname Board (online at RootsWeb.com/Ancestry.com).

13.  Messages post to the Indiana Genealogy Forum (online at GenForum.com).

14.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).