Rubble possible foundation layer running underneath wall 4023.Moderately compact dark grey brown silt with 30-40% inclusions of small to medium sized sandstone sub angular pieces, regular charcoal flecks.
N-S and E-W aligned wall in trench 4. Dolostone, 0.22x0.20 representative size of materials, very rough/ poor finish of stones, random uncoursed, wall foundation, north and south faces visible, occasional whitish lime mortar patches and mostly unbounded.