The cliffs of Dover are shown almost pictorially on this plan, with dark striations indicating steepness. Relief is shown elsewhere by shading and interlining ('hachuring'). Field boundaries are observed. The sandy coast is represented by a speckled pattern and grassland by a green wash. Dover Castle is seen in plan, with dark hachure lines depicting the steep underlying rocks. The castle, known as the 'Key to England', was a site of unique strategic importance, affording the shortest crossing point of the English Channel to continental Europe. Its defences were improved during the Napoleonic conflicts. Special tunnels were even bored beneath the keep for emergency entrance and exit. This drawing was surveyed while the war was at its most ferocious, yet no batteries are recorded.
St Margaret's Bay
1 : 21120 This rough field sketch of the Kentish coastline was produced on about 12 pieces of thin, irregularly cut, paper which were then joined and laid on thick paper. There is considerable mismatch of detail at the joins. The plan runs from the Strait of Dover, through Dover Castle, St Margaret's Bay, Kingsdown, Walmer Castle and Deal. The red colouring normally used to distinguish buildings in settlement areas was not added to this drawing.