Beneath the streets of London lie the tunnels of the world's oldest underground railway. But there is more in the darkness than just train tracks. Amidst the densely packed bones of the ancient plague pits are other line...Beneath the streets of London lie the tunnels of the world's oldest underground railway. But there is more in the darkness than just train tracks. Amidst the densely packed bones of the ancient plague pits are other lines, pathways to another world where other men live amongst the strange beasts which have become part of our folklore.