Edmund William Gosse, 1911 Encyclopædia Britannica, Volume 7… (1911)
“ Shall find that virtue lives in good, not glory.” In French literature, the term couplet is not confined to a pair of lines, but is commonly used for a stanza. A “square” couplet, in French, for instance, is a strophe of eight lines, each composed of eight syllables. In this sense it is employed to distinguish the more emphatic parts of a species of verse which is essentially gay, graceful and frivolous, such as the songs in a vaudeville or a comic opera. ”
