Maybe so..... but if you take a walk around the village of Beckhampton its gardens are full of stones, some of which are quite huge! Also, me and a friend found a massive sarsen near the roundabout on the way to Beckhampton, I personally think that there were avenue stones beyond the cove. Stukely has shown this in his drawings, and even though his perspectives may have been innaccurate, he didnt tend to put stones where there werent stones( if you get my drift!)