The Lyric, it has been generally thought, is of all poetic genres the most spontaneous and artless, which may explain why relatively little attention has been paid to its art. Unity, it is agreed, is essential; yet, aside from references to the unifying function of the refrain, attention has been centered almost exclusively upon unity of idea or prose sense. As to the part played by style, diction, prosody, imagery, and rhetorical devices in achieving unity and conveying what the writer had to express, little is said in discussions of this or, indeed, of other kinds of poetry. It may, therefore, be illuminating to examine a number of well-known lyrics to see if all are formless cris du cœur or if some reveal structure as well as emotion, and if repetition, parallelism, correspondences in meter or language, and other devices, prosodie or rhetorical, seem to be used for the sake of unifying the piece and of expressing its “meaning.” Shelley's songs are admirably suited to this purpose since they are numerous, varied, and familiar, and since they are generally regarded, by admirers and detractors alike, as approaching the beau ideal of the lyric: spontaneous, formless, and vague.