Music for Treble Chorus & Harp March 14, 2010 - Cape Cod Lighthouse Charter School Select Chorus with Margaret T. Bossi, musical director and guest oboist, Elizabeth Doriss present Music for Treble Chorus & Harp featuring Britten’s Ceremony of Carols. Retail Price:  $18.00  Member Price:  $15.00  Select your price option:  Retail Price $18.00 Member Price $15.00 Quantity