In the 1880 US Census for Tilghmanton, Washington County, Maryland the family of Isaac Warfield was enumerated as follows:
Isaac Warfield, Self, Male, Married, Mulatto, 48, b. Maryland, Farmer, Both parents b. Maryland
Lydia A. Warfield, Wife, Female, Married, Black, 47, b. Maryland, Keeps house, Both parents b. Maryland
Sarah E. Warfield, Daughter, Female, Single, Black, 19, b. Maryland, At home, Both parents b. Maryland
Lulitia Barnum, Daughter, Female, Married, Black, 26, b. Maryland, Boarder, Both parents b. Maryland
Chas. Barnum, Son-in-law, Male, Married, Black, 37, b. Maryland, Farm Laborer, Both parents b. Maryland
Clinton J. Adams, Other, Male, Single, Mulatto, 7, b. Maryland, Domestic, Both parents b. Maryland