1.  Illinois Statewide Marriage Index, 1763–1900:

Wyatt, James L	Graham, Amanda F	Morgan	07/22/1869	00C/0053	2154
Wyatt, James L	Chittick, Letitia M	Cass	07/10/1890	056/	5031

Might our subject have later married Letitia?

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

Census Place: Township 17 N, Range 8 W, Cass, Illinois
Source: FHL Film 1254178; NARA Film T9-0178; Pg 809C
	Relation	Sex	Marr	Race	Age	Birthplace
James L. WYATT	Self	M	M	W	35	IL
Manda F. WYATT	Wife	F	M	W	27	MO
Orval WYATT	Son	M	S	W	10	IL
Carrie L. WYATT	Dau	F	S	W	7	IL
William E. WYATT	Son	M	S	W	5	IA

"IA" was then the abbreviation for Indiana, not Iowa.  The question is whether the transcription is verbatim or has been "interpreted" by the transcriber.  Living four doors down from James's brother, Edward WYATT; these are the only WYATTs in T17N.R8W.  I need to extract the original record, in full. 

3c.  1880 Census Images (online at Ancestry.com; Image #35 of 40):

Information not given, or not given literally, on LDS 1880 Census CD.
Location	Enumeration Date	PN	SD	ED
T-17-R-8-W-3rd PM	21 Jun 1880	35	6	57
Husband's Occupation		-
Husband's Father's Birthplace		KY
Husband's Mother's Birthplace		KY
Wife's Father's Birthplace		MO
Wife's Mother's Birthplace		MO
Other	-