The middle level.
When the adit known to be Priors was found, it was full to the roof with clay.
The Groups interest was in the amount of water that was emerging and the old wooden track at the entrance. The sign of a way in.
Excavations started in 1992 to reduce the spoil to floor level but work was sporadic over the following years. The spoil seen outside the entrance would be many times this size by the end of the season. In 1998, an ore truck was brought in to run on track which reduced the labour.