Britten's A Ceremony of Carols is a masterpiece composed on board ship as Britten returned to England from the U.S.A. in 1948, a touching evocation of boyhood lost but never forgotten. A Boy was Born is a work that first made Britten famous, based on a theme and variations of astonishing ingenuity. The Missa Brevis, written for the boys of Westminster Cathedral, is a gem that in some ways looks forward to the War Requiem which came two years later. 69 minutes.