1.  Marriage Record:

2a.  1880 Census: Every-Name-Index/Extraction (online at FamilySearch.org); Every-Name-Index/Images (online at Ancestry.com, Image #3 of 23):  Cross Creek Twp., Washington Co., PA, Roll T9-1201, p. 131C, PN 3, SD 9, ED 240, enumerated 2 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	21	24	25	26
28	28	Evans William	W	M	50			/	Coal Miner		Eng	Eng	Eng
		[William's wife and children]
		Corbin Oliver A	W	M	23	Boarder	/		Asst at Mines		PA	PA	WV

2b.  1880 Census: Every-Name-Index/Extraction (online at FamilySearch.org); Every-Name-Index/Images (online at Ancestry.com, Image #3 of 25):  Hanover Twp., Washington Co., PA, Roll T9-1201, p. 266C, PN 23, SD 9, ED 249, 225/242, enumerated 16 Jun 1880:

Ella GORDON (æ 17, b. PA) is living with her parents, William (æ 56, b. PA) and Malissa (æ 55, b. PA) GORDON.  Living with them is Malissa's mother, Malinda (__?__) McCLURG (æ 82, b. WV).

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

4.  1900 Census Index/Images (online at Genealogy.com):  can't find.

5.  Anon.  Pennsylvania Miracode Index, 1910.  National Archives and Records Administration, Washington, DC (online at Ancestry.com):  can't find.

6.  Allen Elster.  [2004.]  Ancestors of Oliver A. CORBIN (PDF file).

7.  Emails from Allen Elster.