1840 U.S. Census, Essex County, Virginia:
Dunn, Samuel C.
1 male age under 5 [this would be Richard]
1 male age 15-20 [this would be Samuel, age low]
2 females age under 5 [this would be Sarah and possibly Mary]
2 females age 5-10 [one of these would be Francis and maybe Mary or Virginia]
1 female age 20-30 [this would be Sarah]

1850 U.S. Census, Essex County, Virginia
Page 96
Household 545, Family 545
Dunn, Samuel, 40, male, laborer, $188 real estate, born in Virginia
Dunn, Elizabeth, 39, female, born in Virginia
Dunn, Sarah, 18, female, born in Virginia
Dunn, Mary, 15, female, born in Virginia
Dunn, Richard, 14, male, born in Virginia
Dunn, Frances, 11, female, born in Virginia
Dunn, Virginia, 10 female, in school, born in Virginia

Joseph B. Griffith married Sarah Ann Dunn on 4 July 1860 in Essex County, Virginia. He was 38, single, born in King and Queen County, living in Essex County. She was 26, single, born in Essex County and living in Essex County. His parents were Sanger B. Griffith and Elizabeth Gleason; her parents were Samuel C. Dunn and Elizabeth McTyre. Joseph was a carpenter. Peter Ainslie performed the ceremony. [Essex County, Virginia, Marriage Register 1, page 9, line 18.]

1860 U.S. Census, Essex County, Virginia:
Dwelling 565, Family 550
Griffith, Joseph B., 40, no occupation listed, $50 personal estate
Griffith, Sarah A., 40
They were listed as married within the year.
They lived very close to Samuel and Elizabeth Dunn.

1870 U.S. Census, Essex County, Virginia:
Dwelling 1626, Household 1626
Griffith, Joseph B., 48, male, white, carpenter, born in Virginia
Griffith, Sarah A., 38, female, white, keeping house, born in Virginia
Griffith, Edwin S. B., 9, male, white, attending school, born in Virginia
Griffith, Sarah E. L., 6, female, white, at home, born in Virginia
Griffith, Mary F., 2, female, white, at home, born in Virginia