The holes in the old prison yard are pretty deep now; standing on the observation platform looking out over the neatly-labelled clean-cut dips and hollows a definite wave of coolness comes up out of the deeper layers of soil. No skeletons in evidence; perhaps they've taken them all away already. Perhaps the initial reports of plague pits were exaggerated, but there are a couple of doubtless very interesting walls. At the other end of the site, by the entrance, there's a length of yellow waving coil sticking out from under the solid metal fence, held steady by a rock, a chunk of cast-iron drain pipe and the rib of a some large animal. It looks for all the world like some sort of spirit extractor, designed to draw ghosts off-site where they can disperse safely into the fumes of New Street. Or perhaps it's bait left out to catch amateur archeologists.