Since L. Valerius Antias was serving under two Valerii, M. Laevinus and P. Flaccus, and because the inhabitants of Antium (cf. the cognomen Antias) were skilled seamen, Münzer (Gent. Val. 60) believes that this Prefect was not a person invented by the historian Valerius Antias. (Broughton MRR I)
Sent to Rome in charge of the captured envoys of Philip and Hannibal (Liv. 23.34.9, but cf. 38.7). (Broughton MRR I)
The position of Antias as Prefect is suggested by the context and by the phrase qui praeesset. In Liv. 23.34.9 Antias seems to have command of both the ships and the captured envoys, while in Liv. 23.38.7, P. Valerius Flaccus was in charge of the ships. Antias may be a mistake for Flaccus, but it is also possible that Flaccus was sent to see about the ships and Antias to watch the prisoners. (Broughton MRR I)