Searching for Melvin

I have been searching for my husband's grandfather he is the only link in the family i haven't found.
His name is Melvin Clarence Donner he was born around 1890 and lived in
Afton Iowa with his wife Rose and two children one of which was my father-in-law Keith. He left his family around 1920 and was not heard from then on. If anyone knows anymore information on him please contact me.