Notes in order of opus or WoO numbers: Leonore, with typescript of Philip Gossett's article 'The arias of Marzelline: Beethoven as a composer of opera' (1979). Notes on op. 90, Piano sonata no. 27 in E minor, 1991, n.d. 'On the history of a wrong note [in op. 102 no. 2], 1980. 'Beethoven's opus 104 quintet', n.d. 'The completion of the...