I don't think there was a divorce. Arthur and Janet were living together in Portsmouth City, Virginia during the 1940 census and she died in Erie Co., Pennsylvania just 9 days after the census was taken! See following link.
http://www.erielibrary.org/research-services/obituary-listin...It would be interesting to research this as she was only 22 years old - perhaps an auto accident? You should send to the Erie County Library for her obit.
-Larry