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This is a roughly drawn field sketch of the north bank of the Thames, extending from West Thurrock, at the bottom, to Great Warley, at the top. The plan is made up of about 13 irregularly cut pieces of paper watermarked "1794". Some mismatch of detail is noticeable along the edges where the sheets have been joined, and the orientation of the lettering on the component parts is varied. Trigonometrical stations, from which the surveyors took angular readings, are marked 'flag', notably at 'Bulvan Fenn' and just above the low water mark for the Thames.
A NEW and CORRECT MAP of the COUNTRIES TWENTY MILES Round LONDON.
In the second half of the18th century, the introduction of turnpike roads and the increased coach-traffic in and out of London contributed to the popularity of the maps of the countryside around the capital. This map was published in Henry Chamberlain's 1770 'A New and Compleat History and Survey of the Cities of London and Westminster.' The map's title features along the top, with a scale bar and explanatory note below the plan, and border divided in degrees of latitude and longitude. Churches, hills and other architectural or geographical landmarks are indicated by symbols. Market towns are marked by stars.