That's not a particularly reassuring thing to learn, now is it? Skulduggery's own cabin had seemed lived in but empty when he'd arrived, before Lucius; and Max himself had never seen his cabinmate before. Likely, they both disappeared for similar reasons.

"Subsumed by the ship, maybe," he says unhappy at the thought. "It's unlikely they managed to escape back to their realities, but that's certainly an option..." Not a very likely one, unfortunately.