sentences:  He was on the musical staff at Glyndebourne from 1974 to 1978, and conducted the Glyndebourne Touring Opera, including "Così fan tutte" in 1975.He collaborated with the British director Jonathan Miller on a celebrated production of Mozart's "Così fan tutte" at the Opera Theater of St. Louis (USA) shortly before his death.He remained active at the San Francisco Opera for all his adult life, supporting General Director Kurt Herbert Adler, first as a repetiteur and then as a member of the conducting staff.