The upper chamber is very fine with many examples of prisoners' graffiti.  It contains a display showing the different kinds of treatment received by the prisoners who were held here.

This tower is part of Henry III’s late 1230s curtain wall which rings the castle. Built on the fortress’s south-eastern corner, this tower overlooked the river. Archers could shoot arrows through the arrow-loops in this room.

Upstairs was a comfortable chamber with a huge fireplace and decorative window. The tower’s exterior and windows were restored in 1857-8.