Kiri: Peta pelabuhan Pulau Pinang dan Seberang Perai, 1930-an (Hydrographic Department, London, 1936: |"Penang Harbour, Malacca Strait : from Admiralty surveys to 1930 / Hydrographic Office").
Kanan: Peta Georgetown, 1930-an (Survey Department, Malaya, 1936: |"Business and residential areas of George Town Penang").

(Sumber: National Library of Australia).