William Forest Anderson was married first to Mary Helen Harris, half sister of Felix Harris. Mary Helen died in 1887 and William remarried in 1889. In the 1900 census, he is listed with his wife Sallie, two sons, two daughters, and two boarders, one of whom was Felix Harris.

1900 Census of Smith, Cross Co AR

Name Age
William F Anderson 40 Feb 1860 m10 AL GA AL
Sallie Anderson 42 Oct 1857 m10 VA VA VA
James Anderson 12 Dec 1887 s AL AL AL  <---
Forest Anderson 10 Sep 1889 s AL AL AL  <---
Mary Anderson 7 Sep 1892 s AR AL VA  <---
Lena Anderson 4 Jul 1895 s AR AL VA  <---
Diny Edwards 53
Felix Harris 68

[Listed two houses away is family of James Anderson, b May 1861, and his family. James Anderson is also AL AL AL and probably brother of William F. Anderson.]

1910 Census, Wynne, Cross Co AR

Name Age
William F Anderson 50 m18 AL AL AL
Sallie Anderson 52 m18 VA VA VA
James G Anderson 22 s AR AL AR  <---
Forrest Anderson 18 s AR AL AR  <---
Mary Anderson 17 s AR AL VA  <---
Lena Anderson 16 s AR AL VA  <---

1920 Census, Wynne, Cross Co AR

Name Age
Will F Anderson 60 married AL AL AL
Mary Anderson 24 single AR AL AR

1930 Census, Wynne, Cross Co AR

Name Age
James E Anderson 41
Maude M Anderson 36
William F Anderson 69 widowed AL AL AL