‘No one’s around. Good.’ He went back to work and looked at the mine layout Rex had on the desk. There was the canteen, there was the holding pen, that was this office, that was… a blue squiggly line… “The Tartarus?” Joachim said, squinting. “Oh wait, that’s the tunnel me and Handy were digging. Huh.” And there was the room controlling the dog’s iron door that blocked the exit. Joachim nodded with satisfaction. Rolling the map up and stuffing it under his wing, he made his exit and rushed towards the control room.