The entire length of the lower passage.
The passage here is about 1.2m tall and 0.6m wide, the height and width both
reduce gradually towards the outer opening.
Note how the chamber is not straight, it has as slight curve to the east.
Two large slabs have been inserted into the west wall of the passage here, an
edge-set recumbent stone (lower right), and a
vertically set stone just south of this.