Final answer:
Tiresias is NOT a source of prophecy about the Romans' future in The Aeneid; the Sibyl of Cumae, Anchises, and Helenus are all sources of prophecy within the epic.
Step-by-step explanation:
Within Virgil's The Aeneid, various figures provide prophetic insights about the Romans' future. Among the list provided, the Sibyl of Cumae, Anchises, and Helenus all serve as sources of prophecy. However, Tiresias is not mentioned as a prophetic source in Virgil's epic. The Sibyl of Cumae is particularly noted for guiding Aeneas during his journey through the underworld and offering prophetic statements, while Anchises, Aeneas's father, provides visions of future Roman glory during the visit to the underworld. Helenus, a Trojan priest, also offers predictions regarding Aeneas's journey to Italy. Conversely, Tiresias, who is a well-known prophet from Greek mythology, does not play a role in the predictions of Roman destiny within The Aeneid.