Grace had a stroke a few months prior to her death. She died in her sleep during the night of 24/25 November 1992. Up to that time her life had been unaffected by illness. She worked in her pottery shop up until the last year of her life.
She got the last letter written by General John Waldron prior to his "suicide" mission. His plane had only enough gas to get to the mission, but not enough to return.