Hi Natalie,
Just noticed your query of 2 years ago.
William James Bolding was indeed married to Armintha Ellis Bolding, and they did die within one day of each other (he on Feb 18, she on Feb 19).
However, she died in the year 1920, and he in the year 1938. He is found on the 1930 Census, in fact, living with his daughter, Florence (Bolding) Talbott, and her husband, Arthur.
There are Arkansas Death Records on Ancestry to back up these death dates.
I hope this helps clear up any confusion.
-Jennifer