1.  Marriage Record:

2a.  LDS.  Family Search: Internet Genealogy Service: IGI - International Genealogical Index (online at FamilySearch.org).

Harvey CARRICO Birth: 15 Nov 1816, Grayson, Virginia; Death: 20 Sep 1885 Father: William CARRICO; Mother: Martha STEPHENSON Marriage: About 1836, Virginia Spouse: Nancy A. HILL Birth: 15 Nov 1818, Grayson Co., VA; Death: 21 Mar 1880 Source: patron submission

2b.  LDS.  Family Search: Internet Genealogy Service:  AF - Ancestral File (online at FamilySearch.org): 

Harvey CARRICO Birth: 1818, Va Father: Joseph CARRICO; Mother: Martha Marriage: 19 Jan 1832, Grayson, Virginia Spouse: Nancy Source: patron submission

In the 1850 census, someone apparently has mistaken Joseph CARRICO's widow, Martha (ISOM) CARRICO [æ 39], for William CARRICO's ex-wife, Martha (STEPHENSON) CARRICO [æ 58].  Note that the former is far too young to be Harvey's mother, also, that Harvey is too young to have married in 1832. 

3.  1840 Census Index/Images (online at Ancestry.com, Image #X; extracted by Diana Gale Matthiesen):

1840

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- Co.

- Twp.

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pp. -

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These data indicate:

4.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #9 of 148):  District No. 19, Grayson Co., VA, Roll, p. 163A, 63/63, enumerated 17 Jul 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Harvey Carrico	32	M		Farmer		Va
Nancy Carrico	32	F				Do
William Carrico	14	M				Do
Matilda Carrico	11	F				Do
Margaret Carrico	7	F				Do
Marshall Carrico	5	M				Do
Robert Carrico	2	M				Do
Martha Carrico	1/12	F				Do
Martha Carrico	58	F				NC

.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).