by Virgil
Atque haec ut certis possemus discere signis
Weather-wisdom from the ancient world
Georgic 1, lines 351 - 392
Elegies, Book 1.5
Metamorphoses Book 8, Lines 780 - 816
Odes Book 3.1
Georgics Book 1, lines 461 - 514
Elegies Book 1.6
by Propertius
Metamorphoses Book 8, lines 817 - 845
Catullus 6
Aeneid Book 1, lines 387 - 409
by Virgil
'Quisquis es, haud, credo, invisus caelestibus auras
The oracle of the swans brings good news to Aeneas