Born: February 2, 1885, Logan County, Arkansas.
Died: August 22, 1959, Crystal Springs, Arkansas.
Buried: Bluebonnet Hills Memorial Park, Colleyville, Texas.
William was the son of William David Slater and Melvina Elizabeth Williams, and husband of Nettie M. Washington (married 1910).
When he was five years old, his family moved to near Sallisaw, Oklahoma.
In 1915, he began preaching at a school house named Shiloh in eastern Oklahoma.