Bobby, I don't know about David Sr. being married twice. He died around 1870. He and Sarah Sparks had 12 children. His son John Abel was married twice. First to Martha Emily Shaddix and second to Mary E.Clifton. David Henry Thorton Dover was only married to Viola Turner. David Jr. was married twice. First to Charlotte Temple Robinson and second Cynthia Elizabeth Summers. As for the twins Samuel Martin Dover died in 5-29-1937 in Ellis Co., TX, Nacy Luvena Dover Henson died in Ellis Co., TX . Mary Johnt