1 : 31680 The Ordnance Survey took particular care in plotting the south coast of England, as this was the area most immediately vulnerable to invasion. This plan notes military barracks at Selsea, Aldwick and Bognor to the bottom right of the plan. Buildings are blocked in red and black ink and infilled at Chichester, in the centre of the plan, and Arundel, at the right. A poor house and pest house are located a considerable distance beyond the boundaries of Chichester.
1 : 31680 .This plan of the South Downs coastline runs from Kingston by Sea at the bottom left to Telscombe at the bottom right., The,vulnerable south coast was heavily defended against invasion., Barracks are recorded at New Shoreham and Lewes, with a series of batteries at Brighthelmston., The draughtsman also documented Anglo-Saxon defensive mounds at Poor Man's Wall and the Devil's Dyke, even though the recording of archaeological details did not become obligatory until 1816. Budgen, Thomas