Durrington Walls is, in Atkinson terminology, a class II monument; that is, it has two opposed entrances. The excavators cleared a strip some 1,800 feet long and 110 feet wide forming a chord some 400 feet from the centre of the circle. This strip included one side of the south-east entrance causeway, and part of the very important area just inside the entrance. On both sides the excavators dug out the ditch and investigated the area where the bank had been. The ditch proved to be 40 feet wide and 20 feet deep, so vast that it completely dwarfed the mechanical excavators used to remove the upper silts. Traces of the external bank were also found, though this was mostly ploughed out. However, it could be seen that this was 100 feet wide, and under the bank, on the old turf surface were found sherds of middle Neolithic pottery, showing that there had been habitation on the site before the henge was built. Inside the circle two smaller henges were found, consisting in both cases of concentric rings of posts. Of these, the bigger is the south one just inside the entrance causeway. About twothirds of it lay within the excavated strip and it proved to be of four periods. The first period consisted of four concentric circles of fairly slight posts, the innermost circle having only six post-holes. The most notable feature of the early henge was the entrance ; for in front of it, facing the main causeway, was a fairly long row of posts curving backwards at the ends like a pair of horns, and forming a façade to conceal or adorn the henge itself. There was a gap in the middle for an entrance, and a couple of postholes formed a short avenue to the henge.
These post-holes form the concentric circles of the second phase henge.
This hole must have supported a huge post. The view is down the ramp along which the post was lowered.
In the second phase, the henge was rebuilt on a much more substantial scale. The four slight circles were swept away and replaced by circles of vast posts. These increased in size towards the centre, so that the central circle