The group continues eastwards, cautiously avoiding the stairs leading up to the balcony on the north side of the prison (called the "western balcony," even though it is much more north). In the rear of the prison, there is some drainage but not a lot that goes out to a tree that has grown up from the rich minerals carried by some portion of the prison that catches rainwater and sends it this way while scouring bits inside. Finally, though, the group is stopped by a massive tarn on the eastern and rear side of the prison that has knocked down part of Harrowstone's outer all and ... unless you want to go swimming in icy waters ... is an impassable barrier.

What now?