"If so, take a look at the area at the top of the picture and try to find a
dark line marked 5 -6-7.
That dark line is a trench that carries the effluence away from the moat of
ROCKHENGE and as a result the entire monument is not flooded."
It looks much more likely to be one of the many trackways in the area .
Note how it curves round respecting Amesbury 11 (Bronze Age bell barrow ) , which post dates the ditch .