1840 U.S. Census, Essex County, Virginia:
Durham Jacob
2 males 10-15
1 male 15-20
2 males 20-30
1 male 40-50 [this presumably is Jacob]
1 female 10-15 [this would be Louisa]
1 female 40-50 [this presumably is Catharine]

1850 U.S. Census, Essex County, Virginia
Page 72
Durham, Jacob, 54, male, farmer, value of real estate $2,000, born in Virginia
Durham, Catharine, 61, female, born in Virginia
Durham, James, 28, male, laborer, born in Virginia
Durham, George, 26, male, laborer, born in Virginia
Durham, Jacob, 24, male, laborer, born in Virginia
Durham, Louisa, 22, female, born in Virginia
Durham, William, 17, male, laborer, born in Virginia
St. John, Delphia, 90, female, black, born in Virginia, cannot read or write

Thomas Durham Jr. married Louisa C. Durham on 8 October 1857 in Essex County, Virginia. He was 32; she was 29. Both were single [not widowed], born and resided in Essex County. He was a mechanic. The parents were Thomas Durham and Ann Brizendine, and Jacob Durham and Catharine Greenwood. Thomas Durham performed the ceremony. [Essex County, Virginia, Marriage Register 1, page 5, entry 13.]

She is listed as the mother of her son John in John’s marriage to Ida Durham Covington.