Libretto (in French) for the 1884 four-act version of the opera <i><a href="https://en.wikipedia.org/wiki/Sapho_(Gounod)" class="extiw" title="en:Sapho (Gounod)">Sapho</a></i> with music by <a href="https://en.wikipedia.org/wiki/Charles_Gounod" class="extiw" title="en:Charles Gounod">Charles Gounod</a>. (The book title page has been added as a cover sheet and is out of sequence.)
<div class="fn value">
Émile Augier (1820–1889), author</div>
Augier, Émile (1894). "<i>Sapho</i>, opéra, musique de Charles Gounod" (libretto of the 1884 four-act version), pp. 451–504 in <i>Théâtre complète de Émile Augier</i>, volume 1. Paris: Calmann Lévy. <a rel="nofollow" class="external text" href="http://babel.hathitrust.org/cgi/pt?u=1&amp;num=451&amp;seq=519&amp;view=image&amp;size=100&amp;id=wu.89008071813">HathiTrust</a>