In the 1880 US Census for District 217, Galley Rock, Yell County, Arkansas the family of Peter Barnum was enumerated as follows:
Dwelling #129; Family #141
Barnum, Peter; Mulatto; Male; 61; Married; Farmer; Can read and write; b. Tennessee; Father b. Tennessee; Mother b. South Carolina
Barnum, Winnie; Mulatto; Female; 41; Wife; Married; keeping house; Can read and write; b. Tennessee; Both parents b. South Carolina
Barnum, Wyatt, Mulatto, Male, 24, Son; Single; Farmer; b. Arkansas, Father b. Mississippi, Mother b. Tennessee
Barnum, William, Mulatto, Male, 21, Son; Single; Works on farm; b. Arkansas, Father b. Mississippi, Mother b. Tennessee
Barnum, Amanda, Mulatto, Female, 19, Daughter; Single; At home; Can write; b. Arkansas, Father b. Mississippi, Mother b. Tennessee
Barnum, Edward, Mulatto, Male, 13, Son; Single; Works on farm; Attended school within the census year; Can write; b. Arkansas, Father b. Mississippi, Mother b. Tennessee
Barnum, Anderson, Mulatto, Male, 11, Son; Single; Works on farm; Attended school within the census year; Can read and write; b. Arkansas, Father b. Mississippi, Mother b. Tennessee
Williams, Randolph; Mulatto; Male; 32; Boarder; Single; Farm laborer; Can read and write; b. South Carolina, Both parents b. South Carolina