— born in Christian Co., KY:
  4.  Charles Muscoe KAY, b. 20 Mar 1831
  5.  Margaret Rebecca KAY, b. 20 Oct 1832
  6.  Perine/Perinn Leander KAY, b. 9 Nov 1835

— born in Adams Co., IL:
  7.  Mildred Ann Hasseltine Judson KAY, b. 20 Apr 1838
  8.  Mary Ellen KAY, b. 17 Oct 1840
  9.  Cynthia Emily/Emeline KAY, b. 4 Mar 1843
10.  Idella "Idelie" KAY, b. 1 Aug 1845
11.  Robert KAY, Jr., b. 10 Feb 1849

1.  Jordan R. Dodd, ed.  1993.  KY, NC, TN, VA, WV Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-229):

Kay, Robert G.

Burrus, Cynthia M.

Mar 25, 1824

Todd Co., KY

2.  Census Index:  U.S. Selected Counties, 1830 (Broderbund CD-315):

1830

Kay, Robert

KY

Christian Co.

p. 31

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

1840

Kay, Robert

IL

Adams Co.

Quincy

p. 27

4.  1850 Census Index/Microfilm (online at GenealogyLibrary.com):  Town of Payson, Adams Co., IL, p. 195B, 198/207, enumerated 23 Nov 1850 (extracted by Diana Gale Matthiesen):

Robert Kay	46	M	Farmer	3500	Va
Cynthia M "	45	F			Ky
James R   "	20	M	Student		"
Charles M "	18	M	"		"
Margaret  "	17	F			"
Perine L  "	14	M			"
Ann       "	12	F			Ill
Mary A    "	10	F			Ill
Emeline   "	7	F			"
Idelie    "	5	F			"
Robert Jr "	1	M			"

5.  P.W. Hiden.  1936.  "Burrus."  Tyler's Quarterly Historical and Genealogical Magazine XVIII: 59-61 (republ. 1981 as pp. 283-286 in Genealogies of Virginia Families by Genealogical Publ. Co., Baltimore, MD; 1997 as Broderbund CD-187).  On p. 285:

Cynthia Mills Burruss b. Feb. 15, 1805 m. Mar. 25, 1824 Robt. Kay...

6.  Rick Waggener.  Ancestors of Lacey Allison Waggener.  FamilyTreeMaker User Home Page. [link died]

7.  Email from Sherm Weimer:

This information is from the book "Kay - Pendleton - Neel Families" by George and Margaret Rose (1969).  They site several old bibles for the following information: Children: 1. William Thomas Kay, Dec. 13, 1824 2. Sarah Ann Kay, Oct. 6, 1826 3. James Rogers Kay, Aug. 31, 1829 4. Charles Muscoe Kay, March 20, 1831 5. Margaret Rebecca Kay, Oct. 20, 1832 6. Perrin Leander Kay, Nov. 9, 1835 7. Mildred Ann Hasseltine Judson Kay, April 20, 1838 8. Mary Ellen Kay, Oct. 17, 1840 9. Cynthia Emily Kay, b. March 4, 1843 10. Idella Kay, Aug. 1, 1845 11. Robert Kay, Jr., Feb. 10, 1849