1.  Marriage Record:

2.  1860 Census Images (online at Ancestry.com; Image #10 of 13):  Bethlehem P.O., Bath Borough, Northampton Co., PA, p. 44, PN 122, 876/1010, enumerated 14 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):¤•

Chr W Stroup	24	M			2600	680	Pa
Sarah     "	22	F					"
J Edward  "	2	M					"
Mary Fatzinger	25	F		Widow			"
Sarah Barnet	60	F		"			"

Living next to Charles's parents, Samuel & Mary STRAUB/STROUP. 

3.  1870 Census Index/Images (online at Genealogy.com; Image #15 of 18):  Bath P.O., Bath Borough (Dist. 294), Northampton Co., PA, Roll 1381 (Book 1), p. 424A, PN 15, 123/133, enumerated 20 Jul 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):¤•

Straub Christian	34	M	W	Dry Goods Mechs Ret	800	8000	Pa
______ Sarah Jane	33	F	W	Keeping house	4000		Pa
______ Edward	11	M	W	at home			Pa
______ Charles	9	M	W	at home			Pa

4.  1880 Census Images (online at Ancestry.com; Image #4 of 14):  Bath Borough, Northampton Co., PA, p. 232D, PN 9, SD 4, ED 60, enumerated 8 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	8	9	10	13	15	24	25	26
35	37	Straub C W	W	M	44			/	Dry good Merchant		PA	PA	PA
		______ Sarah J	W	F	43	Wife		/	Keeping House	Heart disease	PA	PA	PA
		Getter? Ellon C	W	F	20	Servant	/		Servant		PA	PA	PA

5.  Joseph H. Werner.  1891.  Inhabitants of Northampton County as furnished by the Census Bureau at Washington, D.C., in the Eleventh U.S. Census, 1890 (excerpts online at "Rita's" web site):•

Bath Borough Straub Joseph E 32, wiskey gauger--Amanda E 33, Lena R 11, Samuel C 5, Charles E 1, Viola S 24, Christian W gentleman, 53, Hattie S 29, William E 4

Christian W. is our subject.  Joseph Edward is Christian's son; Amanda is Joseph Edward's wife; and Lena, Samuel, and Charles are Joseph Edward & Amanda's children.  Hattie is Christian's second wife and William is Christian & Hattie's son.  I don't know who Viola is.

6.  1900 Census Index/Images (online at Genealogy.com, Image #5 of _):  54 Main Street, Bath Borough, Northampton Co., PA, Roll 1446 (Book 1), p. 210A, SN 3, SD 3, ED 104, enumerated 5 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	21	22	23	24	25	26	27
*	54	53	53	Straub Christian C	Head	W	M	Dec 1835	64	M	15			PA	PA	PA	Salesman	0		Y	Y	Y	O	F	H
				______ Hattie S	Wife	W	F	Feb 1861	39	M	15	2	1	PA	PA	PA				Y	Y	Y
				______ William C	Son	W	M	Sep 1886	13	S				PA	PA	PA	at School		9	Y	Y	Y
*Main Street