The superb Boston-based choir Blue Heron have released Music from the Peterhouse Partbooks, vol. 4, featuring works of Robert Jones, Nicholas Ludford, and Robert Hunt in reconstructions by Nick Sandon. Almost nothing is known about Jones (fl. 1520-35), yet his Missa Spes nostra is, as Scott Metcalfe writes in his notes, the "unique creation of a mature composer with a distinct individual voice." Flowing vocal lines are interspersed with tart, ambiguous harmonies; there is a canny use of musical space, a sense of height and depth to the unfolding structures. As on previous releases, the singing is both precise and fluid, immaculate and alive. In Robert Hunt's Stabat mater, another remarkable piece by an otherwise unknown composer, the choir swells to a darkly splendid climax at "Stabat natus sic contentus / Ad debellandum Sathanam," the latter name slicing through the air.