Gladys Mary

In the novel The Secret Adversary, Gladys Mary is a person named on a list of survivors of the Lusitania. Tommy and Tuppence were searching for a woman whose Christian name was "Rita", believing that this Rita might be a witness to what happened between Danvers and Jane Finn on the ship. However, as the list of survivors mostly listed people are Mrs. or Miss, they had to call on the survivors individually to find out their Christian names. Gladys Mary was one of the people they visited.