1.  Jordan R. Dodd, ed.  1993.  Illinois Marriages: Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-228):

Thompson, Thomas

Asher, Betsey

22 Mar 1826

Greene Co.

2. 1830 Greene Co., IL, Federal Census transcribed by John C. Jacoby.  Microfilm Roll #M19-24, enumerated 27 Nov 1830 (online at USGenWeb Archives Census Project):

Page #	Line #	Last Name	First Name	Data
9	21	Thompson	Thomas	000 010 001 - 200 010 001

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	20-29	1800-1810	= Thomas (b. 1804/5)
1 male	60-69	1760-1770	= John (b. ca. 1760)
2 females	4 or under	1825-1830	= "Mieley" (b. 1828/9) = Malinda (b. 1827/8)
1 female	20-29	1800-1810	= "Betsy" (b. 1807/8)
1 female	60-69	1760-1770	= Winifred (b. ca. 1764)

This scenario is hypothetical, but likely.  I have no proof that Thomas and Betsy are the younger couple and that the elder couple is John and Winifred (Brickey) Thompson.  But John is said to have died in 1843, so he must be accounted for in 1830 and 1840.  As the only other two John Thompsons in Greene Co. in 1830 are too young to be him (and have already been accounted for), John & Winifred must be living with one of their children, who must be listed as head-of-household.  This is the only elder Thompson couple in Greene Co., other than William & Temperance (Brickey) Thompson, who have also been accounted for.  This must be John & Winifred, and this goes a long way towards proving that Thomas Thompson, son of John & Winifred, is the one who married Betsy Asher in 1826, not the one who married Eveline Bonig in 1826, because in 1830, Thomas & Betsy have two daughters under four years of age, but Thomas & Eveline have one daughter and one son under four years of age.  John & Winifred are living with the Thomas who has two daughters.

3a.  Census Index:  U.S. Selected Counties, 1840 (Broderbund CD-316):

Thompson, Thomas

IL

Greene Co.

Wilmington Precinct

p. 120

3b. 1840 Greene Co., IL, Federal Census transcribed by John C. Jacoby (microfilm roll #M104-60; online at the Greene County ILGenWeb site and the USGenWeb Census Project site):

Precinct	Page #	Line #	Last Name	First Name	Data
Wilmington	121	15	Thompson	Thomas	110 010 000 - 212 001 000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1835-1840	= James (b. 1837/8)
1 male	5-9	1830-1835	= John (b. 1831/2)
1 male	20-29	1810-1820	= Thomas (b. 1804/5)
2 females	4 or under	1835-1840	= Nancy (b. 1835/6)
1 female	5-9	1830-1835	= Rhoda (b. 1833/4) = Louisa (b. 1830)
2 females	10-14	1825-1830	= "Mieley" (b. 1828/9) = Malinda (b. 1827/8)
1 female	30-39	1800-1810	= Betsy (b. 1807/8)

4.  Census Microfilm Records:  Illinois, 1850 (Broderbund CD-301):  "South West part of District No. 22," Montgomery Co., IL, p. 113, 270/275, enumerated 29 Aug 1850 (extracted by Diana Gale Matthiesen):

Thomas Thompson	45	M	Farmer	1000	Ky
Elizabeth  "	42	F			Tenn
Malinda    "	22	F			Ill
Mieley (?) "	21	F			"
Louisa     "	20	F			"
John       "	18	M	Farmer		"
Jane       "	16	F			"
Nancy      "	14	F			"
James      "	12	M			"
Winey      "	7	F			"
Emaline    "	4	F			"
Mary       "	2	F			"

On this same page, for a different household, the census taker had entered "Cornelia" for a woman's given name, then crossed it out and put "Miley."  Are these attempts on the part of this census taker to write "Nellie," the nickname for Cornelia?  There are numerous Cornelia's in the family, so the name is likely.

5.  LDS.  Family Search: Internet Genealogy Service: IGI - International Genealogical Index and AF - Ancestral File (online at FamilySearch.org).

6.  Broderbund.  World Family Trees.  Vol. 22, Pedigree No. 150; Vol. 23, Pedigree No. 3214.