During the construction of a drain through Head Street in 1913, A.M. Jarmin observed a cellar under the road. This appeared to be early Tudor in date, constructed of small bricks, and was situated 10 yards north of the remains of the Roman Head Gate. Jarmin argues 'the cellar appeared to be connected with the gatehouse, which probably replaced the earlier Roman guard room and narrow entrances characteristic of that period. The indications seemed to suggest that at some date the original Head Gate...had been replaced by another structure, probably with apartments for the watch and a basement chamber, on a site slightly in the rear and therefore north of the original gate.<1>