 He retired to San Diego in 1973, where he died after suffering a heart attack on September 3, 1974.The same year, a second edition of "Genesis of a Music" was published with extra chapters about work and instruments Partch made since the book's original publication.In 1991, Partch's journals from June 1935 to February 1936 were discovered and published—journals that Partch had believed to have been lost or destroyed.