In the six years since this female quartet astonished the music world with its clear- voiced, impeccably sung renditions of medieval chant and polyphonic music, chant rose from the dark and dusty corners of classical music to enjoy a phenomenal run at center stage. New and reissued chant recordings achieved sales figures normally reserved for popular music. This is the recording that started it all (that Spanish monks disc came later), winning awards and earning near- permanent resident status on the national charts. Spiritually moving and vocally revelatory, this program re-creates a kind of mass sung in English churches during the 13th and 14th centuries. With their warm tone and perfect intonation, these four singers achieve an expressiveness that is rare among chant interpreters, most effective in the seductive, highly ornamented "Kyrie." The sound is exemplary--although a studio recording, it perfectly conveys the atmosphere of an English cathedral. --David Vernier