While writing his Broadway shows, Edwards continued to work on more serious pieces. He made his name in America with an operatic adaptation of the play ''
King René's Daughter'' (1893), presented as a one-act lyrical drama. Edwards wrote the libretto himself, from an existing English translation. The opera was criticised on the grounds that his music "wallows in Wagner". Edwards had intended to submit it for the
Sonzogno prize for one-act operas, but it was completed too late. The work had only limited success. He also composed
The Patriot (1907), another one-act grand opera, to a libretto by Stange, set in the American War of Independence. He completed two more grand operas,
Elfinella and
Corinne, but these were unproduced. He was particularly proud of his sacred cantatas, including
The Redeemer and
Lazarus. His oratorio
Mary Magdalene was not fully completed before his death. In 1907 he set a translation of
P. D. A. Atterbom's poem
The Mermaid. He wrote incidental music for productions of many plays, including
Quo Vadis,
In the Palace of the King,
Gringoire,
The Wooing of Priscilla,
King Robert of Sicily,
The Cipher Code,
In a Balcony, ''The Land of Heart's Desire'' and others. He also published collections of songs, including "Sunlight and Shadow", and copyists' full scores of two symphonies, in E major and A minor, exist in the
Tams-Witmark collection at the
Library of Congress. ==Views on music and songwriting==