Career
She was the wealthy widow of Pittsburgh steel king Ernest T., and the former wife of Polish author Jerzy Kosiński. The Mary H. Public Library in ton, West Virginia, is named after her. On June 2, 1958 in ton, West Virginia, a public library called "The Mary H. Public Library" was named in her honor with cutting the ribbon in person.
Mary Hayward was diagnosed with a brain tumour, of which she died on August 1, 1968, aged 52 or 53.
She left Kosiński nothing in her will.