Hmm; are we sure it was that colour* for any length of time? Methinks it probably was, but that's my opinion. It would be interesting to see - don't know what the Highway's Agency would say about it's distractional qualities, though!
*If it was that colour, could it be a clue as to it's intended use - authors have suggested that the burial mounds and barrows would have been bare chalk/earth, so if this was bare chalk, might it suggest a link to one of those Pryor-esque (or Pitt-like) ancestral processional landscapes?
Peace
Pilgrim
X