That's very interesting Peter and I thank you for the information. Dames deals with the name Cunetio as follows, "The antiquity of the form is clearly shown by the Roman riverside settlement called Cunetio - their principal town in the entire Kennet valley."

So, with Ekwall's and Dames' info placed side by side, we seem to have a Roman town called Cunetio on the banks of a river called Cunetio. I'm not quite sure where we go from there except, perhaps, back a bit to the source of the Kennet, which appears to be the point where the waters from the Swallowhead spring join with the Winterbourne stream - and that is practically at the foot of Silbury (with a bridge called Pan Bridge, which originally was almost certainly Roman, crossing the stream before joining with the waters from the Swallowhead).

So? Well, Dames goes on to say that, "...Stukeley reported: 'I took notice that apium grows plentiful about the springhead of the river Kennet. To this day the country people have a particular regard for the herbs growing there, and a high opinion of their virtue.' The magic knowledge also resided in the water itself, which was accordingly carried from the 'sacred spring to the area, not a little famous among them', to be drunk on the Silbury summit, so passing from birthplace to birthplace, and from eye to eye. '<i>For a woman, they say, has an eye more than a man</i>'."*

* Italics mine.