Other features and artefacts date from the 1st century, increasing in the 3rd century and declining in the early 4th century (when Rome withdrew from Britain): a range of domestic buildings and courtyards, boundary ditches, industrial ovens and hearths with evidence of copper, lead and iron workings, cobbled surfaces, pits for quarrying and storage, burials, streets. The estimated size has now been raised to 24 hectares. The town seems to be a rural commercial centre, with industrial production relying on local timber (charcoal) and imported metals. It fits into the pattern of small towns with a hinterland of 8–10 km in radius, representing a day's journey; five other Roman towns lie within 15–25 km. Its size and commercial activity increased in the 3rd century as did many other towns; remains of a defensive ditch may also belong to that period. As with other East Anglian sites, in the absence of building stone, it was timber built. It was a 'planned' settlement in the sense that, though there are limited prehistoric finds, it did not supplant an earlier settlement. Judging by the amount of material, particularly pottery and coins, it was probably built after the Boudiccan revolt and the sacking of Camulodunum (Colchester). This is the biggest Roman find in Suffolk for 25 years. The final report of this excavation is expected in 2013.