User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-10750309-20130718140216/@comment-6068707-20130718201152

in the son of Neptune, when percy is speaking to Octavian. he says, "Dont you have... I dont know, an oracle or something?" to which Octavian replies. "What a cute idea." so maybe it could be implyed that the romans have never had a great need for an oracle. or more like they cant have one.