The first of a series of ten editions (RCM31–40) publishing the antiphons and anonymous Magnificats in the Lambeth choirbook, an early sixteenth-century manuscript possibly associated with the collegiate church of the Holy Trinity at Arundel, Sussex. The seven anonymous works are probably by a single author whose identity is discussed in the introduction to the edition; their idiosyncrasies of style pose interesting interpretative challenges for modern singers. For five voices: SATTB. viii + 20 pages. ISMN 979-0-57039-085-4.