West wall of drain cleaned ... AMS Horizontal (normal)
East wall of drain cleaned ... AMS Horizontal (normal)
Looking south. Miniature polygonal wall (MP) at its junction with the drain east wall (D). Poros block (P) and limestone block (L) ... AMS Horizontal (normal)
Looking west. Miniature polygonal wall (MP) with poros block (P) and east wall of drain (D) ... AMS Horizontal (normal)