Saint Cyr. Libretto. German. Public domain libretto, Library of Congress

mit theilweiser Benutzung eines Stoffes von A. Duman ; von Oscar Walther ; Musik von Rudolf Dellinger. (statement of responsibility)
U.S. RISM Libretto Project.
Legal notice on title page.
Oskar Walther was a pseudonym of Oskar Friedrich Kunel--NUC pre-1956.
Singers' names not given.