In this study, the Anton Webern's music is considered in two groups: that which was written before Webern adopted the twelve-tone technique, Opp 1-16, and that written in the twelve-tone technique, Opp. 17-31. This division is not intended to represent an attempt at periodization of Webern's music, for the changes of style in Op. 17 are not that significant. But the fact that Webern employed the twelve-tone technique in all the works he wrote after Op. 16 makes this a natural point of division for a study of this sort. Besides the music of Webern, two peripheral areas are included in this study. No attempt has been made at an exhaustive biography of Webern, but facts relative to his life, and impressions about the person are presented. Also, to create a proper perspective for the study of Webern's which existed during the time that Webern lived and composed, is presented.

This study has two divisions: Part I, an historical and analytical summary of the emergence and development of the divertimento and the serenade in the eighteenth century, and Part II, the culmination of these structures in the works of W. A. Mozart. Two primary purposes are envisioned: 1) to further our knowledge of how German Gesellshafts-musik evolved toward its peak in the second half of the eighteenth century, and 2) to furnish a useful analytical handbook of Mozart's works in these genres.

The Seville Cancionero is a manuscript collection of songs from late fiftennth-century Spain and is preserved today in the Biblioteca Colombina of Seville with the number 7-1-28. This dissertation describes the document and provides commentary and transcriptions of the Seville Cancionero.