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Figure 2. Section through the ditch showing its position relative to the front of the south-west gatehouse. THE DITCH In 1978 the north-east end of the terrace wall, balustrade and parapet adjoining the south-west gatehouse were taken down and rebuilt under the supervision of Mr. Arthur Baldwin (fig. 1). Approximately 71 feet of terrace wall was demolished measured from its junction with the gatehouse wall. In the course of the work a record was made of archaeological features visible when the in-fill behind the terrace wall was cut back 4 feet from the face of the terrace wall (fig. 2). The principal feature recorded was a rock-cut ditch 62 feet wide at the surface of the bedrock with sloping sides which was visible to a depth of approximately 20 feet although the bottom of the ditch was not reached. On the southerly side the ditch was revetted by a battered masonry wall, standing to a height of 8 feet, seated on a ledge in the bedrock. No further information was recovered. THE EAST CURTAIN WALL During the winter of 1985-86 another length of terrace wall (fig. 1) had to be rebuilt because of instability, and in the course of the work the writer maintained a watching brief and recorded archaeological detail in the exposed section. The terrace wall was demolished down to the level of the garden ground surface and cut back to a maximum of 1.75 metres to remove all loose and cracked masonry. The balustrade (fig. 3) was seated directly onto the terrace wall (9) which was constructed of coarse red sandstone bonded with a pink mortar. The parapet (4) had an outer face of mortared brick, the inside face being a mixture of unbonded stone rubble and brick.