User blog comment:Menara/The Son of Sobek: The official PJ and Kane Chronicles Crossover/@comment-112.198.82.200-20130515034638/@comment-3146930-20130515095121

Did you just agree with yourself? But looking past that, yes Rachel mentioned the Doors of Death in her prophecy, but no one knew what the Doors of Death were. Also, souls hadn't started escaping the Underworld until later, yet this was one of the first things Percy suspected when fighting Carter. Yet during the fight, Percy seemed to have full knowledge of what the Doors of Death were and that souls were escaping.