In the 1880 US Census for Lewisburg, Conway County, Arkansas the family of James Barnum was enumerated as follows:
James Barnum, Self, Male, Married, Black, 28, b. Mississippi, Laborer, Both parents b. Mississippi
Harriet Barnum, Wife, Female, Married, Black, 24, b. Arkansas, Keeping house, Both parents b. Arkansas
John Barnum, Son, Male, Single, Black, 6, b. Arkansas, Father b. Mississippi, Mother b. Arkansas
Grant Barnum, Son, Male, Single, Black, 3, b. Arkansas, Father b. Mississippi, Mother b. Arkansas
Nona Barnum, Dau, Female, Single, Black, 2, b. Arkansas, Father b. Mississippi, Mother b. Arkansas
Willis Barnum, Dau, Female, Single, Black, 11 months, b. Arkansas, Father b. Mississippi, Mother b. Arkansas
Kibbee Harris, Brother-in-law, Male, Single, Black, 29, b. Arkansas, Laborer, Both parents b. Arkansas
Dennis Harris, Brother-in-law, Male, Single, Black, 20, b. Arkansas, Laborer, Both parents b. Arkansas