“ Nearby is a region of many curiously shaped hillocks. Last week a tremendous storm washed one of these half away, revealing a strange shed made of concrete panels. Its long side is aligned east-west, about 4m by 3m and 2.5m high, with a flat roof slightly sloped down to the north . The double doors in the south side have murky glass panels in them, but nothing much can be seen from outside, although it looks a bit like the top of a staircase. Will you dare go inside? What will you find there, and what lies below?”