[Footnote: _The varied landscape_, l. 160. The pleasure, we feel on examining a fine landscape, is derived from various sources; as first the excitement of the retina of the eye into certain quantities of action; which when there is in the optic nerve any accumulation of sensorial power, is always agreeable. 2. When it is excited into such successive actions, as relieve each other; as when a limb has been long exerted in one direction, by stretching it in another; as described in Zoonomia, Sect. XL. 6. on ocular spectra. 3. And lastly by the associations of its parts with some agreeable sentiments or tastes, as of sublimity, beauty, utility, novelty; and the objects suggesting other sentiments, which have lately been termed picturesque as mentioned in the note to Canto III, l. 230 of this work. The two former of these sources of pleasure arise from irritation, the last from association.] "So when by HANDEL tuned to measured sounds The trumpet vibrates, or the drum rebounds; Alarm'd we listen with ecstatic wonder To mimic battles, or imagined thunder. When the soft lute in sweet impassion'd strains Of cruel nymphs or broken vows complains; As on the breeze the fine vibration floats, We drink delighted the melodious notes. But when young Beauty on the realms above Bends her bright eye, and trills the tones of love; 180 Seraphic sounds enchant this nether sphere; And listening angels lean from Heaven to hear.