The _Inner Ward_ is about 45 yards north and south, or along the river front, by 54 yards east and west. Its figure is a rectangle, with the angles so rounded off that its aspect is almost as much that of a circle as of a square. Towards the river is a steep slope of about 20 feet. On the other sides a similar slope falls towards the ditch. On the crest of the slope on these three inland sides is a bank of earth about 8 feet to 12 feet high, especially strong at the north-west corner. The entrance was at the south-east corner. The inner area or platform of the ward is about 15 feet above the level of the exterior soil. On this platform, about 8 yards from the north-east corner, is a low circular mound about 5 feet high and 40 feet diameter upon its table-top. It may have been somewhat higher. It has no ditch of its own. The ditch of this ward is from 40 feet to 50 feet broad, and still contains water. [Illustration: EATON SOCON, BEDS.] North of this is the _North Ward_, above 35 yards north and south, by 80 yards east and west. This also has a ditch about 40 feet broad, on the west and north fronts. From the inner ward it is separated by the cross ditch common to the two, and towards the river is a steep slope about 20 feet high. Besides these defences, the slope on the west and north is crested by a steep bank of earth, and towards the south, or inner ward, is one somewhat slighter. The _Outer Ward_ is in figure long and curved. Its breadth ranges from 29 yards at the north end down to 22 yards near the south-east end, beyond which it terminates upon the mill leat in a point. This ward is separated from the other two by a common ditch, which communicates with the cross ditch, and thus at three points, directly or indirectly, with the river. The south-eastern end opens at the junction of the leat with the river. The leat covers this end of the ward, and from the leat springs the outer ditch, from 40 feet to 50 feet broad, which covers the outer front of the ward, and at its northern end, sweeping round by a sharp angle, is continued till it joins the north ditch, of which it thus forms a part. The entrance was at the south-east corner, where a modern causeway crosses this outer ditch. The road thence skirts the edge of the outer ward, along the margin of the leat, and thence, by a second causeway, crosses the inner ditch, and, ascending the slope, gains the inner ward. No doubt these causeways represent drawbridges. It does not appear how the inner and north wards communicated. The bridge between the latter and the outer ward was probably at the south-west corner of the northern. The ditches are in parts reduced in depth, and evidently were originally fed from the river. There is not a trace of masonry, but depressions in the bank of the north ward seem to indicate towers at its north-east and north-west angles. It is convenient to use the term angle, but the lines are more or less curved