1a.  Illinois Statewide Marriage Index, 1763–1900:

Means, Royal P

Marshall, Jane

Greene

03/07/1837

001/0037

00001090

1b.  Jordan R. Dodd, ed.  1993.  AR, CA, IA, LA, MN, MO, OR, TX Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-227):

Means, Royal P.

Thornason, Lucinda

18 Jul 1847

Benton Co.

2.  1840 Census Index and Digital Images (online at Ancestry.com; Image #3-4  of 6; extracted by Diana Gale Matthiesen):

1840

MO

Benton Co.

Montgomery Twp.

pp. 58A-58B

Ln. 20

Royal P Means

100 010 - 000 100

0100000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1835-1840	= James (b. 1837)
1 male	20-29	1810-1820	= Royal (b. 1812/3)
1 female	15-19	1820-1825	= Jane
1	person employed in agriculture

3.  1850 Census Index/Images (online at Ancestry.com; Image #11-12 of 18 — images misplaced under the label, Tom Twp.):  Alexander Twp., Benton Co., MO, pp. 296B-297A/590-591, enumerated 22 Oct 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

322	322	Rial P Means	37	M	Farmer		Illinois
		Lucinda Means	38	F			Kentucky
		Nancy A Means	15	F			Do
		George B Means	13	M			Do
		James Means	11	M			Do
		Thomas Means	11	M			Do
		Sarah Means	8	F			Do
		John F Means	6	M			Missouri
		James M Means	13	M			Illinois
[next page]
323	323	Eliza Means	8	F			Missouri
		Amanda Do	6	F			Do
		Claricia Do	5	F			Do
		William Do	2	M			Do

Eliza should not have been given new dwelling and family numbers just because she started a new page.  The first six children listed, plus Clarissa, are Lucinda's children from her prior marriage.  James M., Eliza, and Amanda are Royal's children with his first wife.  William would appear to be the only child born to Royal & Lucinda.

4.  1860 Census Images (online at Ancestry.com; Image #12 of 15):  Warsaw P.O., Township 39, Range 23, Benton Co., MO, p. 246, PN 22, 148/146, enumerated 12 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Lucind Means	46	F		Farmer Tent		960	Ky
Thomas	21	M		F L			"
James	21	M		F L			"
Sarah	17	F		Domest			"
John	15	M		F L			Mo
Clarissa	13	F					"
William	11	M					"
Eliza Means	16	F					"
Amanda	14	F					"

"Tent" apparently means "tenant"; "F L" is "farm laborer."  The first five children are Lucinda's by her prior marriage, to Garrison THOMPSON.  William is the only child born to Royal & Lucinda.  Eliza and Amanda are Royal's children with his first wife, Jane MARSHALL.

5.  1870 Census Images (online at Ancestry.com; Image #14 of 293):  Quincy P.O., Alexander Twp., Benton Co., MO, p. 221B, PN 14, 99/99, enumerated 6 Jul 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Mains Loucinda	53	F	W	Keeping house	500	422	Kentucky
Thomason Claricy	23	F	W	at home			Kentucky
Mains William	21	M	W	Farmer			Missouri

Clarissa is Lucinda's daughter from her first marriage.  William is Lucinda & Royal's only child together.  Listed next to Lucinda's son from her first marriage, John Franklin THOMASON.