Harry (The A.B.C. Murders)

In the novel The A.B.C. Murders, Harry was one of the brothers of Alice Ascher. He travelled to South America, and was never heard from again. Mary Drower told Poirot that with Alice Ascher's brother Tom dead in the war and Harry out of touch, she would be Mrs Ascher's only relative (excluding Mrs Ascher's estranged husband).