This drawing covers the settlements and surrounding country of part of Essex. Brentwood is the largest of these settlements. The layout of the town is indicated by red blocks. The straight line of the road leading to the town reveals its Roman origin, although the draughtsman, unusually, does not label it as such. The main communication routes are coloured yellow, conforming to military cartographic standards. The meanderings of the River Crouch are painstakingly plotted, with the surrounding open land represented by dots.