L. 19. _l'astre pur des deux frères d'Hélène._ It is the 'fratres
Helenae, lucida sidera' of Horace (_Od._ i. 3), namely Castor and
Pollux. The constellation was said to be propitious to seafarers.
L. 21. _Pæstum._ A town in Lucania famous for its roses. See Virgil,
_Georg._ iv. 118, 119.
L. 29. _du sein de la mer._ _Il._ i. 359-361. Thetis 'instantly appeared
up from the grey sea like a cloud.'--CHAPMAN.
L. 30. _comme un songe._ In the _Odyssey_ (xi. 207) the soul of Ulysses'
mother vanishes (like a dream). Also _Aen._ vi. 702.