Looking for Darning IN Arkansas

Marion N. DARNING was born about August 1871 in Missouri. He married Lena Elizabeth HOWARD on December 21,1899 in Russellville,Pope County,Arkansas. They had two daughters, Jessie Florence and Minnie.
I believe Marion died sometime before 1914.

Family stories say that Marion worked for the railroad. While away from home he became ill and died. He had stayed the night at a boarding house and it was thought he may have been poisoned.