Oh, I don't dispute that the Silbaby mound is man-made, I'm just disputing when.

Look at the old series of maps; you have a series with a couple of houses on, right the way through from 1886 to 1961, plus a trackway going northwards off the road to the fields north of the main road (thus showing that the road and field were about the same height).

Then, all of a sudden in the 1976 map, the main road shows a deepish cutting all along the northern side. The houses disappear, as do tracks north from the main road, and Silbaby appears.

I'm not disputing the Stukely map; it does indeed show a mound in about the right place, but I am highly curious as to how a hundred years of OS survey mapping (which was initially an artillery map, hence highly sensitive to topographical features) could miss a mound as big as Silbaby. I am also struck by the similarity in volume between the Silbaby mound, and the amount of rubble the cutting would have produced, and the lack of a similar amount of rubble anywhere else in the locality, unless of course the top third of Silbury hill is modern (joke alert!).

It therefore seems like anyone disputing the Silbaby-as-modern-dump hypothesis would need to show where a few thousand tonnes of excavated chalk from the cutting went, other than into a dump at the side of the road.

At present I cannot locate the relevant planning applications for that road work, which would show what was done, when it was done and where the spoil went. Can anyone assist here?