Do you think that he might still be living? I found his headstone on Find A Grave with no death date as you indicated. I also found the pictures of Newell and Ruby's headstones. The information on Find A Grave for them indicated a relationship with Ruth LaRee Potter Littlefield. She is their daughter. If you look at her Find A Grave in the same cemetery, it has her obituary. She died in January 2011 and she is survived by her brother Donald Potter as of that date. His headstone picture was added in July 2011 without the death date so maybe he is still living.