Jacob's not been in a mine before. But he's no stranger to the half-finished tunnels under London, new drains and sewers being carved out beneath the cellars of the city. These mining shafts aren't quite the same, the cave-ins and the decay of many years has seen to that, but the smell of damp air and the scurry of small creatures is familiar. It's not very pleasant, but none of Jacob's jobs ever are.

"Come on, you can make it," He says, having reached the top of the rocky debris that has almost completely blocked off the tunnel mouth- leaving only a small gap to climb through. Big enough to clamber through, with help. That's why he's there, on the other side, letting his eyes adjust to the dark and holding out a hand for his companion to take, helping them into the shadows.

"If we stay in this main tunnel until we get down into the newer seams, we'll probably find what got left behind when they abandoned this place."