On the western side of the site, close to the buildings revealed by the Daniels excavations, an extraordinary length of wall has been found. This wall, which seemingly follows a similar alignment to the “villa” buildings that lie beneath the gardens to the west, is built from carefully worked sandstone blocks. Those on which the face is visible are incised with deep diagonal lines which seem to have been intended to act as keying for plaster. This wall survives up to two courses high, although the method of construction is very varied.
Stuart Blackwood 2008