One of the best-known works in the Eton choirbook, this virtuosic setting of the Marian antiphon owes its popularity to its remarkably varied and colourful musical palette and its less obvious but equally important musical coherence. Opinion is divided over its authorship: is it by the William Cornysh who was Master of Westminster Abbey’s Lady Chapel choir between 1479 and 1491 and then a Gentleman of the Royal Household Chapel until his death in 1502, or by a namesake who was Master of the Children in the same chapel until he died in 1523? One of Antico’s transposed editions of Eton choirbook music written at an unusually high or low pitch. For five voices: SATTB. ix + 18 pages. ISMN 979-0-57039-146-2.