1850 Census of Davis, Franklin Co NC

Name Age
Mourning Mitchel 83 NC
Nancy Mitchel 38 NC

1860 Census of Louisberg, Franklin Co NC

Name Age
John T Mitchell 61 m, NC
Julia Mitchell 68 f, NC
W S Mitchell 24 m, NC
Nancy Mitchell 51 f, NC

1880 Census of New Berne, Craven Co NC

Name Age
William Rountrie 38 m, NC
Julia J. Rountrie 37 f, NC (wife)
William M. Rountrie 9 m, NC (son)
Mattie C. Rountrie 1 m, NC (dau)
Nancy Mitchell 70 f, NC (widowed, mother-in-law)
Alice Manker 25 f, NC (white, house keeper)
Mary Williams 40 f, NC (black, servant)
Hannah Fonville 18 f, NC (black, servant)
Solomon Fisher 16 m, NC (black, servant)

This is probably not Nancy Mitchel the daughter of John and Mourning, in light of the following 1870 census:

1870 Census of New Berne Ward 2, Craven Co NC

Name Age
Alexander Mitchell 63
Nancy Mitchell 60
Julia Rountree 26
William Rountree 28
Grizelle Walker 23
James Walker 25

Alexander Mitchell married Nancy S. Jenkins in Craven Co NC on 15 Oct 1833.740