Mary Frances O'Sullivan seems to have been a shorthand instructor. She was the wife of Thomas Francis O'Sullivan. In. 1940 she qualified as a telephonist in the ARP (assigned to the Upper Levels of the Peak) alongside her three daughters.
During the Japanese occupation she remained un-interned as Irish. She remarried soon after liberation in 1945, becoming Mrs. E. A. V. Remedios. She was alive in June 1953 at the time of the death of her son John.