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Figure 15: Front of the bank Section 1, Area 1
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Period 1 - The front of the clay bank to left, with the truncated remains of the turf revetment, showing the cut for the insertion of the wall (period 2).
Period 2 - Only two or three stones of the back of the lowest course of the added stone wall remain in position. These are overlaid by the clay packing inserted behing the wall , here slipped forward. The berm is covered with a layer of fine mortary rubble, which in part represents the construction deposits of the wall, as well as possibly the degradation products of the wall over a long period (2B), and possibly also part of the the upcast from the cleaning out of the ditch in period 2C. The rest of the wall remains as an unstructured pile of stones and rubble, deposited in the destruction of period 3.
Period 3 - The pile of large and small loose stones and mortar, which gives way to the right to a deposit of stones and mortar showing clear tip lines, is derived from the destruction of the wall. A build-up of clayey soil above this  indicates a period of abandonment (period 3B).
Period 4 - The stone and mortar deposits of period 3 are cut by a shallow feature which is the palisade trench of period 4, filled with dark earthy material, together with stones and mortar from earlier deposits.
Compare sections in similar positions in Figs 21, 25, 29.