Patricia Pakenham-Walsh was born in Dublin. In 1951, she married the photographer John Moyes. The marriage broke up in 1959. She married James Haszard, a lawyer and interpreter at the international court of justice in The Hague. Her mystery novels feature C.I.D. Inspector Henry Tibbett. One of them, "Who Saw Her Die" (Many Deadly Returns in the US) was nominated for an Edgar Allan Poe Award in 1971. She also wrote several juveniles and short stories. She died in Virgin Gorda (British Virgin Islands) on August 2, 2000.