It was by chance that Claire found a loose brick. She went to use the bridge to keep her from stumbling a little clumsily. She turned to the structure and tilted her head. "Hey... Come look at this." She wiggled the brick until it came out, and she traced her fingers over the skull carved there. She then peered into the spot where it had been and stuck her free hand inside. "I think it's a clue!" she said with breathless excitement. She hadn't looked as lively as that since punching Mr. Longbottom in the nose.