517 Not one Parnassus, nor one Helicon
Parnassus > (Mount Parnassus, chief seat of Apollo, god of song and
music, and leader of the Muses)
Helicon > (Mount Helicon, sacred to Apollo and his Muses)
518 Left for sweet Muses to be harboured, 519 But where you yourself have your brave mansion;
But > Except brave > splendid mansion > dwelling-place; mansion
520 There indeed dwell fair Graces many one:
Graces > (The handmaids of Venus, bestowers of beauty and charm)
521 And gentle nymphs, delights of learned wits,
nymphs > (Minor female divinities with whom the Greeks peopled all
parts of nature: the seas, springs, rivers, grottoes, trees,
mountains)
wits > minds
522 And in your person without paragon
paragon > comparison; competition