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

Daniel OBORN Spouse: Sarah CUMPF Marriage: 8 Jun 1859, Marion, Ohio Source: Marriage Records, 1824, 1964, Ohio. Probate Court (Marion County)

Daniel OBORN Birth: 30 Jul 1831, Marion, Ohio; Death: 24 Feb 1874 Spouse: Sarah J. GOMPH Birth: 11 Dec 1839, Marion, Ohio; Death: 09 May 1917

William H. OBORN Birth: 24 May 1862, Marion, Ohio Father: Daniel OBORN; Mother: Sarah J. GOMPH Source: [patron submission]

2.  1860 Census Index/Images (online at Genealogy.com, Image #19 of 36):  Marion P.O., Richland Twp., Marion Co., OH, Roll 1006 (Book 1), p. 391A, PN 57, 414/403, enumerated 23 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Daniel Oborn Jr	23	M		Farmer			Ohio
Sarah    "	20	F					Do
Mary     "	2/12	F					Do

Daniel is 28, not 23.  Listed between Daniel OBORN (æ 66, b. PA, wife Mary) and William S. OBORN (æ 23, b. OH, wife Sarah).

3.  1870 Census Index/Images (online at Genealogy.com, Image #25 of 28):  Waldo P.O., Richland Twp., Marion Co., OH, Roll 1240 (Book 1), p. 176A, PN 27, 206/211, enumerated 22 Jul 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Obern Daniel	38	M	W	Farmer	?	3000	Ohio
_____ Sarah J	26	F	W	Keeping House			Do
_____ Marietta	10	F	W				Do
_____ William H	7	M	W				Do
_____ William H	2	M	W				Do

Listed next to Joseph B/R OBERN (æ 30, b. OH, wife Catharine), who is three households from Daniel's twin brother, William OBERN (æ 38, b. OH, wife Sarah A.).