After an extended tour, Wagner was back in Zürich by late October and began writing down the "Rheingold" music on 1 November. He finished the first draft in mid-January 1854, and by the end of May had completed the full orchestral score. According to Holman, the result was "a stunning break from Wagner's earlier musical output" In the three years following his completion of the "Rheingold" score, Wagner wrote the music for "Die Walküre", and for the first two acts of "Siegfried". At that point, in 1857, he set "Siegfried" aside in order to work on "Tristan und Isolde", and did not return to the "Ring" project for 12 years.