Michael Cooper, the New York Times's new classical-music reporter, investigates Britten's lost orchestration of Les Sylphides. Evidence of Britten's American period is still turning up here and there. Back in 2006, I was browsing the Britten shelves at the New York Public Library when I came across a very curious score of Les Illuminations: it appeared to be proofs of the first edition, with scattered corrections in a hand that looked very much like Britten's. Evidently, Boosey had donated the proofs to the NYPL, and they had been bound together as a circulating score. I called attention to the item, and authorities in the manuscripts division confirmed my suspicions. The score is no longer part of the circulating collection.