Brownish layer butting up against walls underneath (4016). Firm mid red/ orange brown sandy silt with 20% small limestone/ mortar chunks and sub angular stones. Same as (4032)
Firm brown clay under 4021, potentially made ground. Hard mid orange/ red brown clay with very rare small sub angular stones and small sub circular limestone chunk. Vast majority of layer clean.
Greyish limestone layer under 4021. Soft light whitish grey sandy silt with rare small sub angular stones. Similar to 4030 but may have been left from 2019 excavations