Locus 108 is the final chamber.
Approximately 86cm deep in the entire chamber.
Two walls, one running E (or SE) and one W (or NW) were constructed from basalt with one course of large faced blocks, and a smaller course topping them. The other two walls were soil.
NE wall: soil, 0.80m (length) x 0.69m (height)
E-S wall: basalt, 2 courses; bottom course - 2 large faced basalt blocks: E 0.90m x 0.69m, S 0.73m x 0.72m. Upper course: 2 basalt blocks and cobbles: E 0.70 x 0.32m x 0.19(h), S 0.40m x 0.18m.
SW wall: soil, 0.92m (l) x 0.68m (h). The SW wall had two basalt blocks on top of it (0.66 x 0.17 x 0.31m). There were unstable and fell into the chamber.
W-N wall: 2 massive faced basalt blocks, upper course on top is the "cromlech". W 0.79m x 0.86 (h), N 0.89m x 0.76m (h). 4 cromlech stones range in size from 0.50 xx 0.39 x 0.22m to 0.23 x 0.20 x 0.23m.