An important ‘proof state’ sea-chart of the Canton River

The original pre-publication working proof example with manuscript corrections and annotations used for De Guignes 'Voyages a Peking, Manille et l'Ile de France, faits dans l'intervalle des années 1784 'a 1801...', published in Paris 1808. It contained six maps, of which this is the most important, showing Macao, Lantau and part of Hong Kong, although unnamed.