Cataractonium

Town began a a Vicus but grew into a respectable walled town with a Mansio and Thermae.  A small segment of the town wall is visible on the racetrack. In the late Roman period a defensive work was built on the north side of the river.  There was considerable extra-vallum settlement.

http://www.pastscape.org.uk/hob.aspx?hob_id=52316&sort=4&search=all&criteria=cataractonium&rational=q&recordsperpage=10

http://roman-britain.co.uk/places/cataractonium.htm

Great Archaeological Report

http://archaeologydataservice.ac.uk/archiveDS/archiveDownload?t=arch-281-1/dissemination/pdf/cba_rr_128.pdf