onstage harp and 18 onstage anvils. Die Walküre requires one snare drum, one D clarinet (played by the third clarinettist), and an on-stage steerhorn. Siegfried requires one onstage cor anglais and one onstage horn. Götterdämmerung requires a tenor drum, as well as five onstage horns and four onstage steerhorns, one of them to be blown by Hagen. Tonality Much of the Ring, especially from Siegfried act 3 onwards, cannot be said to be in traditional, clearly defined keys for long stretches, but rather in 'key regions', each of which flows smoothly into the following. This fluidity avoided the musical equivalent of clearly defined musical paragraphs, and assisted Wagner in building the work's huge structures. Tonal indeterminacy was heightened by the increased freedom with which he used dissonance and chromaticism. Chromatically altered chords are used very liberally in the Ring, and this feature, which is also prominent in Tristan und Isolde, is often cited as a milestone on the way to Arnold Schoenberg's revolutionary break with the traditional concept of key and his dissolution of consonance as the basis of an organising principle in music. Composition The text In summer 1848 Wagner wrote The Nibelung Myth as Sketch for a Drama, combining the medieval sources previously mentioned into a single narrative, very similar to the plot of the eventual Ring cycle, but nevertheless with substantial differences. Later that year he began writing a libretto entitled Siegfrieds Tod ("Siegfried's Death"). He was possibly stimulated by a series of articles in the Neue Zeitschrift für Musik, inviting composers to write a 'national opera' based on the Nibelungenlied, a 12th-century High German poem which, since its rediscovery in 1755, had been hailed by the German Romantics as the "German national epic". Siegfrieds Tod dealt with the death of Siegfried, the central heroic figure of the Nibelungenlied. The idea had occurred to others – the correspondence of Fanny and Felix Mendelssohn in 1840/41 reveals that they were both outlining scenarios on the subject: Fanny wrote 'The hunt with Siegfried's death provides a splendid finale to the second act'. By 1850, Wagner had completed a musical sketch (which he abandoned) for Siegfrieds Tod. He now felt that he needed a preliminary opera, Der junge Siegfried ("The Young Siegfried", later renamed to "Siegfried"), to explain the events in Siegfrieds Tod, and his verse draft of this was completed in May 1851. By October, he had made the