I believe this to be parents of Michael S. Mayfield.
Missouri Marriage Records, 1805-2002 about William Mayfield Name: William Mayfield Marriage Date: 1 Jul 1860 Marriage Location: Barry, Missouri Marriage County: Barry Spouse Name: Lydia Elizabeth Wisdom
By 1860 they were in Oregon. and can be tracked through Census through 1930.
Anna's parents were--I think---: Elias Slover b. 1844 Washington Co. Arkansas d. 1921 Oregon & Sarah Ellen Hilleray b. 1842 d. 1921. They were in AR in 1850 and in Oregon from then on. Probably both families moved together as it shows Washington Co. AR as home of Mayfields too.