Dover town & harbour plan & sea coast chart. Kent. ADMIRALTY 1943 old map
Title of map:'Dover. 51� 06' 54" N. Long. 1� 18' 48" E. mag. 90� 10' W. (1943) decreasing about 10' annually. Soundings in feet (reduced approx. Natural scale 1/18,500'. DATE PRINTED: Corrected to 15th April 1943. ).