User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-4515675-20121005151408/@comment-5444461-20121006123919

Yeah, I was upset about all of that to. But remember, Percy and Annabeth fall after the knife (technically its a knife, not a dagger. Yes, there is a difference) so if they don't find it and dedulaos (Or whatever his name is)'s laptop immediatly, they probably will find it later. Knowing Rick Riordan, Some monster will have it in a giant treasure trove (Because, you know, stuff falls in tartarus all the time) and the have to fight the monster than get it back, etc, ect. The grey streaks? I really don't know. Maybe they will come back or maybe they will get other 'scars' from tartarus.