The National Opera Studio in London will present the world premiere of scenes of “Perdita” on Dec. 3 and 4, 2024. “Perdita” is an unpublished opera by Dorothy Howell and her only known operatic work. The 20th-century composer left a manuscript, dated July 1917, which was discovered in Howell’s former house in Worchestershire by writer and historian Dr. Leah Broad. {…}