The water appears from a slot part way up on the right hand side of the adit near the end (shortly before it intersects the Matlock Lower Lava). In times of heavy rain/snow melt it also pours out of a slot high on the right hand side a few yards before that point. At these times it can be several inches deep flowing down the level. It sinks in a floor level slot on the right hand side of the adit (as shown in the photo). It can also emerge after heavy rain from 2 points in the small levels off to the left before the adit cuts the Matlock Upper Lava and this water sinks in 2 places on opposite sides of the adit just past the collapse near the entrance. The purpose of the dye trace was an initial attempt to determine the course of the water that sinks on the far side of the Matlock Upper Lave. Detectors were placed in the spring opposite Slinter Wood Cottage, in Bonsall Brook a few yards upstream of the spring, and in Bonsall Brook roughly opposite Owlet Hole Gate (as it has been thought that a sough once emerged there although there seems to be no documentary evidence). All detectors were negative, but at least it showed that the often-expressed view that the Hallicar Wood Level water emerged at the spring was wrong (although the water that emerges in the side passages may do so as it may follow a different course sinking as it does on the other side of the Matlock Upper Lave).