Anúncio de  1920, em inglês, das carreiras marítimas, entre Hong Kong, Cantão e Macau das companhias de navegação “The Hong Kong, Canton & Macao Steamboat Company, Limited”, “China Navigation Company, Limted” e “Indo-China Steam Navigation Company Limited”, sediadas em Hong Kong., (1)

(1) A Handbook to the West River – Being a Short Description of the Chief Places of Interest between Canton & Wuchow. Published by the Hong Kong, Canton & Macao Steamboat Co., Ltd, 1920 https://digitalrepository.trincoll.edu/cgi/viewcontent.cgi?referer=https://www.google.com/&httpsredir=1&article=1029&context=moore