It is difficult to reconcile Henry's birth date and place.  His father was believed to be in Sullivan Co., NC [now TN] when he married ca. 1786.  Isaac was then in the 1790 Census of Pendleton Co., SC.  So, is the birthdate wrong or the birthplace wrong?  One has to be.

A birthplace of Jackson Co. for son, John, doesn't make sense.

1.  Family Group Sheet compiled by Georgie Tolleson and Betty Ann (Matthiesen) Cogliati.

2a.  Census Index:  U.S. Selected Counties, 1830 (Broderbund CD-315):  not found — where are they?!

1830	Davis, Henry	MO	Cole Co.	p. 187
1830	Davis, Henry G.	MO	Cooper Co.	p. 214

These are the only Henry DAVISes in Missouri on this CD.

2b.  Family Quest Archives:  Missouri Federal Census 1830:  Lincoln, Marion, Chariton, Washington, Jefferson, Franklin, Gasconade, Crawford, Cole, Montgomery, Pike, St. Charles, St. Louis, St. Genevieve, Perry, St. Francois, and Cape Girardeau Counties.  Heritage Quest CD M19-72 (extracted by Diana Gale Matthiesen):

1830

MO

Cole Co.

p. 187

Henry Davis

200 010 - 100 010

This couple is too young to be our subjects.

2c.  Family Quest Archives:  Missouri Federal Census 1830:  Scott, New Madrid, Wayne, Callaway, Boone, Howard, Cooper, Saline, Lafayette, Clay, Jackson, Randolph, Madison, Ralls, and Ray Counties.  Heritage Quest CD M19-73 (extracted by Diana Gale Matthiesen):

1830

MO

Cooper Co.

p. 214

Henry G. Davis

000 001 - 200 010

100 - 201

This couple is the right age, but they have no sons, so they, too, are not our subjects.

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

1840

Davis, Henry

MO

Boone Co.

Cedar Twp.

p. 104

I'm not certain this Henry DAVIS is our subject, but he was definitely not in Clinton Co. in 1840 (n.b., Gentry Co. was formed from Clinton Co. in 1845), which census is completely enumerated and online at the Clinton Co. MOGenWeb site.

4.  1850 Census (photocopy from NARA):  Miller Twp., Gentry Co., MO, p. 220, 367/376 (extracted by Diana Gale Matthiesen):

Henry C. Davis	59	M	Farmer	600	NC
Lavinah    "	45	F			Tenn
Henry H. Bedwell	8	M			M

Henry is their grandson, whose mother died in 1844.

5.  David Wayne Kuykendall.  "David Wayne Kuykendall's Ancestors - Yamhill, OR, to New Amsterdam" (online at WorldConnect).

6.  Rose Bowman.  1965.  Letter to "Davis Cousins."  Says that the marriage ceremony between Henry Clark DAVIS and Lavina McBRIDE took place 21 Jul 1820 and was performed by Thomas McBRIDE, but that the marriage was not recorded in Howard Co. until 14 Feb 1822.  I'm always a little bothered by a oddity such as this.  The date a marriage is recorded is, oddly enough, not usually recorded, just the date of the ceremony as given on the Minister's Return.  Granted that minister's were not always timely in getting their returns to the County Recorder, 19 months is an extraordinary delay.  The question in my mind is whether the 21 Jul 1821 date was actually the wedding date recorded.  One more film to borrow…