 In the 1770s, the antiquarian Thomas Percival recorded a well within the castle, close to the south curtain, and walls of buildings inside the castle still standing to a height of .A plan created by the Saddleworth Geological Society in 1842 recorded a ruined structure within the castle's south-east area in addition to the well Percival noted.Trenches in the castle's interior did not reveal the structures on the plans from the 18th and 19th centuries, although the discovery of a posthole indicates there was activity in this area.