User blog comment:Hyperborean/"The House of Hades" – official expectations blog/@comment-4727448-20130731171656

You know, I've been thinking about how we'd find out about Rachel and Octavian meeting in book. If the meeting happens in book, I'm guessing we'll get a POV from someone in CHB or one of the attackers. I personally would like to see a Reyna or Octavian POV.

My other theory is someone's dream. I think if it's a dream, it'll be of someone on the Argo II, so I'd say Jason (more likely) or Hazel (less likely). Why Jason? Because Leo and Piper had POVs in the last book, and Frank would be clueless about New York and CHB in general.