Wolzogen produced a
biography of Wagner and several essays. He was also the editor of three volumes of Wagner's letters and poems. Perhaps his most significant achievement, however, was his series of 'thematic guides' to Wagner's later dramas. In these publications he identified many of the so-called '
leading motives' and gave them names that in many cases are still in use today. Wolzogen's small book 'A Guide Through the Music of Richard Wagner's
Ring of the Nibelung ' was published in 1878, two years after the original production of the
tetralogy at Bayreuth. He also wrote a popular book on
Nordic mythology titled
Die Edda: Germanische Götter- und Heldensagen in 1920. ==References==