1.  Illinois Statewide Marriage Index, 1763–1900:

Cupp, George W

Taylor, Elizabeth

12/24/1873

Adams Co.

2a.  1880 Census Images (online at Ancestry.com; Image #10-11 of 20):  Fall Creek Twp., Adams Co., IL, Roll 174, pp. 124B-125C, PNs 10-11, SD 6, ED 8, enumerated 9/10 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen).  This enumerator left all Dwelling Numbers blank.

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

2

3

4

5

6

8

9

10

11

13

24

25

26

91

Cupp Henry C

W

M

31

/

Farmer

IN

OH

OH

____ Frances L

W

F

28

Wife

/

Keeping House

KY

KY

TN

____ Lillie Jane

W

F

8

Dau

/

IL

IL

IL

____ Katie N

W

F

2

Dau

/

IL

IL

IL

Rankin Charles H

W

M

20

Brother in law

/

Farmer

IL

KY

TN

Cupp George

W

M

32

Brother

/

Farmer

IN

OH

OH

Bates H D

W

M

65

Farm Laborer

/

Farm Laborer

NY

NY

NY

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Bohon A E T

W

M

52

Farm Laborer

/

Farm Laborer

KY

KY

KY

Bohon Maggie

W

F

28

Servant

/

Servant

MO

KY

KY

Bohon Lucy

W

F

19

Servant

/

Servant

MO

KY

KY

The tick in Column 11 indicates George is a widower.  George's children are living with his in-laws (see next source).

2b.  LDS.  Family Search: Census Records: 1880 United States (online at FamilySearch.org):

Census Place: Payson, Adams, Illinois
Source: FHL Film #1254174; T9-0174; Pg 310D
	Relation	Sex	Marr	Race	Age	Birthplace	Occupation	Fa	Mo
Washington TAYLOR	Self	M	M	W	60	PA	Farmer	MD	PA
Harrett L. TAYLOR	Wife	F	M	W	49	TN	Keeping Hse	NC	MD
Mary TAYLOR	Dau	F	S	W	20	IL	None	PA	TN
Laura TAYLOR	Dau	F	S	W	12	IL	At School	PA	TN
Franklin TAYLOR	Brother	M	S	W	54	PA	Farmer	MD	PA
Charles TAYLOR	Nephew	M	S	W	19	IL	Laborer	PA	IL
Albert TAYLOR	Nephew	M	S	W	17	IL	Laborer	PA	IL
Wilmer CUPP	GSon	M	S	W	5	IL	At Home	OH	IL
Albert CUPP	GSon	M	S	W	3M	IL	At Home	OH	IL

3.  Anon.  Monday, 6 Dec 1880.  "Personals."  Marion Daily Star, Marion, Marion Co., OH (online at Ancestry.com).  On p. 4:

Geo. W. Cupp, a farmer from Quincy, Adams county, Ill., arrived on Saturday and will remain four weeks, visiting relatives in Marion and vicinity; the Van Horns, Shafers, Stroubs, and others.

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

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