Vaulted Roman drain, unusually not found at the end of a Street, suggesting that town wall laid out before nearby street grid. The drain consisted of a single arched tile built structure mortared with opus signinum on a yellow mortared base. The total width of the structure is estimated to be about 1.2m and it is about 1.1m high. The central drain channel was approximately 0.6m wide and just over 0.6m high with a downward gradient of about 1 in 25 north-south. The drain extended approximately 1.3m north beyond the wall face into the town area with a roughly -finished end at that point. Where the drain passed through the town wall a relieving arch of tiles had been constructed over it, creating a double arched structure, estimated to be just under 2.0m wide.<1>