And then the light at the end of the tunnel turned out to be a swarm of glow worms in the next tunnel. My hired mage threatened to cast a spell of internal liquefaction on me if I didn't find the treasure chamber soon. My hired swordsmen began gambling to see how they would divvy up my belongings after the mutiny they were clearly contemplating. It was all down to bad cartogpraphy, but I doubted they cared.