1.  Marriage Record:

2.  1860 Census Images (online at Ancestry.com; Image #328 of 430):  Mahontongo P.O., Susquehanna Twp., Juniata Co., PA, p. 796, PN 236, 1633/1, enumerated 2 Aug 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):•

John Cupp	31	M		Farmer	1000	600	Penna
Susanna Cupp	19	F					"
Lucy A Keller	25	F		domestic			"
Henry Bay	21	M		F laborer			"

Listed next to John's widowed sister, Elizabeth (CUPP) STROUP, who is living with their parents, Philip & Molly (KERSTETTER) CUPP, who are next to Michael & Eva Maria STROUP. 

3.  1870 Census Images (online at Ancestry.com; Image #7-8 of 23):  Mahontongo P.O., Susquehanna Twp., Juniata Co., PA, pp. 465A-465B, PN 8, 49/49, enumerated 13 Aug 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):•

Cupp John	41	M	W	Farmer	1200	350	Pa
____ Linda	21	F	W				Pa
____ Lydia	8	F	W				Pa
____ John	6	M	W				Pa
____ ????	5	M	W				Pa
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____ Daniel	3	M	W				Pa
____ Wilson	3/12	M	W				Pa	May

I wouldn't begin to believe this record represents our subjects, except that they are listed next to Michael & Eva Maria STROUP and that Wilson is an unusual name for a CUPP.  Also, that there are serious problems with many records in this township in this census. 

4.  1880 United States Census and National Index (LDS Family History Resource File: CD-ROM Library):•

Census Place: Susquehanna, Juniata, Pennsylvania
Source: FHL Film 1255137; NARA Film T9-1137; Pg 360A
	Relation	Sex	Marr	Race	Age	Birthplace	Occupation	Fa	Mo
John CUPP	Self	M	M	W	49	PA	Farmer Etc.	PA	PA
Susanah CUPP	Wife	F	M	W	38	PA	Keeping House	PA	PA
Louisa CUPP	Dau	F	S	W	17	PA	Servant	PA	PA
John B. CUPP	Son	M	S	W	14	PA	Works On Farm	PA	PA
Eve CUPP	Dau	F	S	W	12	PA	At Home	PA	PA
Wilson CUPP	Son	M	S	W	10	PA	At Home	PA	PA
Lydia A. CUPP	Dau	F	S	W	7	PA		PA	PA
Ezra CUPP	Son	M	S	W	5	PA		PA	PA
Susanah CUPP	Dau	F	S	W	2	PA		PA	PA

Listed between Michael & Eva Maria STROUP and Joel & Catharine (STROUP) DRESSLER. 

5.  1890 Census:  the 1890 Census Population Schedules were destroyed.

6.  1900 Susquehanna Juniata

7.  1910  Copp Susquehanna Juniata

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