ARGUMENT Passing Caieta and Circeii, AEneas sails up the Tiber (1-45).

Virgil pauses to enumerate the old rulers of Latium and to describe the state of the country at the coming of AEneas.

Latinus is King.

Oracles have foretold that by marriage with an alien his only daughter is to become the mother of an imperial line.

Fresh signs and wonders enforce the prophecy (46-126).