Sighing heavily, Harry shakes his head and follows Albus, who continues down the hallway without comment. They turn a corner into another, narrower corridor. This time, the stone, sanded walls are not lined with tomb niches, but with runic carvings which glow reddishly in the darkness. Scorpius glances over them apprehensively. Something dark bubbles lazily in the crude letters, giving them the appearance of being made of lava.