The stone walls stretched out far in front of him, so far that he couldn’t see the end of the tunnel. He assumed that there had to be one, thing like this couldn’t be truly endless, could they? He glanced back behind himself, and saw that the way he had come looked just like the way in front of him. He realized that if he wanted to escape, he didn’t know which way would be better to go. Perhaps he should turn back – the entrance couldn’t have have disappeared, could it? But then if he turned back all his effort would have been wasted, and what if he was closer to the exit than he was to the entrance?