Three previously unreleased works by composer Phil Niblock--Index" (1969); "Tenor" (1972); "Boston III" (1972)--plus an earlier version, "Boston I", all rich works of microtones, overtones, and drones that point to the direction of his subsequent work; "Boston III" was recorded with Rhys Chatham (flute, voice), Martin Bough (tenor saxophone), and Gregory Reeve (viola, voice).