1880 Grant Parish, LA census: Anderson, William, age 26, b. MS Mary, age 26, b. MS William D., age 1, b. LA K. Emma, age 22, sister-in-law, b. LA Anderson, Amanda, age 1, b. LA, niece McDow, Lucy, age 4, b. LA, sister-in-law
If so, then would Lucy perhaps be the sister of Mary Anderson?