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

1860 U.S. Census, Essex County, Virginia:
Dwelling 563, Family 548
Dunn, Samuel C., 50, farmer, $900 real estate, $265 personal estate
Dunn, Elizabeth, 50
Dunn, Richard F., 34, laborer
Dunn, Francis C., 21
Dunn, Virginia, 18
All could read and write; none in school.

Richard Dunn was a member of the 55th Virginia Infantry during the Civil War: Dunn, Richard F.: Enl. 3/1/62 in Co. A. Present as at 6/30/62. Paid in Richmond, 9/10/62. Entered hospital with chronic diarrhoea, 11/9/62. Contracted small pox 11/16/62, and died of it at G. H. Howard’s Grove, 12/21/62, aged 27. [Richard O’Sullivan, 55th Virginia Infantry (Lynchburg, Virginia: H. E. Howard, Inc., 1989), 120.] This is confirmed by National Archives Microfilm 324, Roll 963. He had been transferred to a small pox hospital on 29 November 1862. His signature is on file.