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

George CUPP Spouse: Catherine NORTHSTINE Marriage: 15 Sep 1872, Pickaway, Ohio Source: Marriages, 1810-1952. Pickaway County (Ohio). Probate Judge.

1b.  Jordan R. Dodd, ed.  1998.  Marriage Index: Ohio, 1851-1900.  Liahona Research, Orem, UT (Broderbund CD-236):  not found.

2.  1880 Census (indexed at FamilySearch.org; page online at Ancestry.com, Image #1 of 22):  Lithopolis Precinct, Fairfield Co., OH, p. 59A, PN 1, SD 5, ED 197, enumerated 4 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	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26
7	7	Cupp George	W	M	29				/			Laborer									/	/	Ohio	Ohio	Ohio
		____ Cathrine	W	F	29		Wife		/			Keeping House									/	/	Ohio	Ohio	Ohio

3.  1890 Census:  the 1890 Census Population Schedules were destroyed.

4.  1900 Census Index/Images (online at Genealogy.com; Image #2 of 24):  Columbus Street, Lithopolis Incorporated, Bloom Twp., Fairfield Co., OH, p. 46B, SN 1, SD 11, ED 5, enumerated 1 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):¤•

1900:  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	7	8	9	10	11	12	13	14	15	19	20	22	23	24	25	27
19	19	Cupp Geo	Head	W	M	May 1851	49	M				OH	OH	OH	Day Labor	2	Y	Y	Y	R	H
		____ Margret	Wife	W	F	Oct 1851	48	M	0	0	0	OH	OH	OH			Y	Y	Y

5.  1910 Census Index/Images (online at Genealogy.com, Image #26 of 40):  Columbus Street, Lithopolis Village, Fairfield Co., OH, Roll 1178 (Book 2), p. 193B, SN 2B, SD 10, ED 59, enumerated 16 Apr 1910, official enumeration date 15 Apr 1910 (extracted by Diana Gale Matthiesen):¤•

1910:  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	7	8	12	13	14	17	18	23	24	26	27	28
45	45	Cupp Geo	Head	M	W	57	Wd	OH	OH	OH	Eng	None	Y	N	O	F	H