composing all the music for their two albums, Work Resumed on the Tower (1984) and Letters Home (1986). Cooper's best known work is her 1987 song-cycle Oh Moscow. It was another collaboration with Sally Potter, with Cooper composing the music and Potter the song texts. It premiered at the Zurich Jazz Festival that year and was subsequently performed in Europe, North America and Moscow. The songs dealt with issues facing a divided Europe during the Cold War. Ironically, the Berlin Wall came down 39 days after the work was first performed. Oh Moscow was recorded in October 1989 with Potter, Phil Minton, Hugh Hopper, Marilyn Mazur, Alfred Harth and Elvira Plenar at the 7th Festival International de Musique Actuelle de Victoriaville in Victoriaville, Quebec, Canada, and released on a CD in 1991. In 1990, Cooper spent a few months in Australia where she gave solo performances on bassoon, saxophone and electronics. She also collaborated with Australian singer, writer and theatre director Robyn Archer, arranging and composing the music for Archer's play Cafe Fledermaus, and Sahara Dust, a large scale jazz vocal piece with lyrics by Archer. Sahara Dust was released on CD in 1993 with the voice of Phil Minton, and reflected on the 1990–91 Gulf War and its impact on the world at large. Later that year, she worked in John Wolf Brennan's "Creative Works Orchestra" and performed at the Willisau Jazz Festival. She returned to Switzerland in 1991 performing in Brennan's "SinFONietta" at the Lucerne Festival. Cooper released two collections of her contemporary dance pieces Schrödinger's Cat and An Angel on the Bridge in 1991 and performed her own composition "Concerto for Sopranino Saxophone and Strings" at the British Conservatory in London in 1992, a piece commissioned by the European Women's Orchestra. She also wrote and performed "Songs for Bassoon and Orchestra" with the Bologna Opera House Orchestra in Italy in 1992, and composed "Face in a Crowd" and "Can of Worms" for the San Francisco-based Rova Saxophone Quartet. Illness and death Cooper became aware that she had multiple sclerosis in the "late days" of Henry Cow, but did not disclose this fact to the musical community and continued performing right up until the late 1990s when the illness forced her to retire. In spite of this, Cooper still remained a highly respected and influential figure in the musical world. Her works are regularly performed and even taught