Peter is there in 1880 too perhaps Peter and the older daughter Gertrude were children of a first marriage. Gertrude 15 could hardly have been the daughter of Harriet (25)

J. B. CHESTANG Self M Male MU 40 AL Blacksmith AL AL
Harriet CHESTANG Wife M Female MU 25 MS Keeping House --- MS
Gertrude CHESTANG Dau S Female MU 15 MS At School AL MS
Cornelia CHESTANG Dau S Female MU 8 MS At School AL MS
Baptiste CHESTANG Son S Male MU 2 MS AL AL

Source Information:
Census Place Scranton, Jackson, Mississippi
Family History Library Film 1254650
NA Film Number T9-0650
Page Number 557A

Peter CHESTANG Self M Male MU 24 AL Laborer AL AL
Matilda CHESTANG Wife M Female MU 23 AL Keeping House AL AL
George CHESTANG Son S Male MU 10M MS AL AL
Joseph CHESTANG Son S Male MU 7 MS At School AL AL

Source Information:
Census Place Scranton, Jackson, Mississippi
Family History Library Film 1254650
NA Film Number T9-0650
Page Number 557A