Benjamin Kirkpatrick from Iowa OR Ohio

I've been searching for my Gr-Grandfather for many year's and all I really know is that my Gr-Grandparents had gotten a divorce in the 1900's and I had found them in Marrs Hill,Washington Co. Ar, he was 55 and she was 33 ( Mary Ann Triplett/Pryor/ and married Benjamin in about 1894, and found Benjamin in 1910 being 72 in Hico, Benton Co. Ar. and disappeared in the 1920's and 1930's and yes I tried looking for the death's with no luck in that department either, please help as I've been searching since 1984,
Dianna