We drove the hundred yards to the next fence. There was another vehicle cage. The bus went in, waited and drove on out. We drove right into the heart of the prison. We stopped opposite a concrete bunker. The reception area. The engine noise beat against the concrete surrounding us. Then it shut down and the vibration and clatter died away to silence. The driver swung out of his seat and walked up the aisle, stooping, pulling himself like a climber on the seat backs. He pulled out his keys and unlocked the cuffs fixing us to the seat in front.