[ He wouldn't want to miss out on the part where Percy got turned into a hamster. As they walk, Nico partially pays attention to Percy and Mrs. O'Leary and also searches out any undead. Trying to get a sense of what this town might have been like before they got here. ]

Guess the local sea-life is no friend to Poseidon as it sounds similar to your trip on the Argo II. [ Without Percy around, they had to stick to the air for the most part. If he can't get out via water, then the rest of them have no chance. ] You've had Mrs. O'Leary checking out the forest, looking for a way out?

[ Boats and shadow-travel are out. They'll have to find a different way to leave. ] No. How does anyone tell?