The Meredith GIBSON who signed Hannah's permission slip to marry is either her brother or her uncle (sources differ).

1a.  Jordan R. Dodd, ed.  1993.  Kentucky Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-229):

Thompson, Lawson

Gibson, Hannah

20 Aug 1812

Christian Co.

1b.  D.L. Murray & N.R., compilers.  1995.  Marriage Index: IL, IN, KY, OH, TN, 1720-1926 (Broderbund CD-2):

Thompson, Lawson

Gibson, Hanniah

27 Jun 1812

Christian Co., KY

2.  1820 Census (extracted by A. Robert Matthiesen):

Thompson, Lawson

300010-20010

Christian Co.

p. 36

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
3 males	9 or under	1810-1820	= James (b. 1817) = Son B = Son A
1 male	26-44	1775-1794	= Lawson (b. 1790)
2 females	9 or under	1810-1820	= Mary (b. ca. 1820) = Lucy (b. 1814)
1 female	26-44	1775-1794	= Hannah (b. 1790)

3.  1830 Census (extracted by A. Robert Matthiesen):

Thompson, Lawson

101 000 100 - 221 101

Christian Co.

p. 35

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1825-1830	= Emanuel (b. 1825/6)
1 male	10-14	1815-1820	= James (b. 1817)
1 male	40-49	1780-1790	= Lawson (b. 1790)
2 females	4 or under	1825-1830	= Susannah (b. 1828) = Sarah (b. 1829)
2 females	5-9	1820-1825	= Nancy (b. 1822) = Daughter A
1 female	10-14	1815-1820	= Mary (b. ca. 1820)
1 female	15-19	1810-1815	= Lucy (b. 1814)
1 female	30-39	1790-1800	= Hannah (b. 1790)

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

Thompson, Lawson

MO

Cape Girardeau Co.

Apple Creek Twp.

p. 237

I don't know if this is the same Lawson Thompson, but he is the only Lawson in MO in 1840 on this CD; ditto the online database.

5.  Lawson doesn't show up in 1850 on either the Broderbund CD or at GenealogyLibrary.com, but of course, these indices are far from complete, especially for Missouri.

6.  Christian County Genealogical Society.  1997.  Christian County, Kentucky, Deed Abstracts of Books G-H-I.  Christian Co. Gen. Soc., 1101 Bethel St., Hopkinsville, KY 42240.  On p. 143:

DBI-520, Oct. 9, 1818, from JESSE FORD to LOUSIN THOMPSON, for $600.00, 140 A. of land on the Rock Lick Fork of Tradewater, bounded form bank of Rock Lick Creek, to Samuel Elison's, to Long's line.  S/Jesse (his X mark) Ford, Phebe (her X mark) Ford, Dower relinq.  Rec. 2 Nov. 1818.

7.  Lon Bostick.  1991.  Family History Book:  Christian County, Kentucky.  Turner Publ. Co., Paducah, KY (available from the author at 1110 Hewitt St., Huntsville, AL 35816; also available through Christian County Genealogical Society, Hopkinsville, KY).  On p. 102, an entry for "GIBSON-HOGG."

8.  Archives of THOMPSON-L and KYCHRIST-L mailing lists (online at RootsWeb.com).

9.  LDS.  Ancestral File and IGI (online).

10.  Emails from Marsha Videen, Sherry Yancey Babb.