The Complete Opera Book and Mozart's "Il Seraglio", occupying pp. 851–901. After 1929 it was enlarged to include Verdi's "Simone Boccanegra", Boito's "Nerone", Alban Berg's "Wozzeck", Puccini's "Turandot", Rossini's "La Cenerentola", Mozart's "Così fan tutte", Jaromir Weinberger's "Schwanda the Bagpiper" and Vaughan Williams's "Hugh the Drover" (pp. 901–930). The English 1935 imprint included Bonavia's notes on Rossini's "L'Italiana in Algeri", Rimsky-Korsakov's "Snegourochka" and two operas of Ildebrando Pizzetti: parts of the former supplement had by now been incorporated into the main text, and the overall page-count before index was now 945 pages. While no amount of enlargement could possibly have made the work literally
Persian Letters texts and renewed perspectives. Particularly important were the extensively annotated edition by Paul Vernière and the research of Robert Shackleton on Muslim chronology; also studies by Roger Laufer, Pauline Kra and Roger Mercier, which put new focus on the work’s unity and integrated the seraglio into its overall meaning. Others who have followed have looked into the ramifications of epistolary form, the structure and meaning of the seraglio, Usbek’s contradictions. Beginning about 1970 it is religion (Kra) and especially politics (Ehrard, Goulemot, Benrekassa) which predominate in studies on "Lettres persanes", with a progressive return to the role of the seraglio