Macau in Victorian Geopolitics and Visual Culture: The Opium War and the British Presence in China in Robert Burford's Panorama Description of a View of Macao (1840); [Macau Na Geopolítica e Na Cultura Visual Vitorianas: A Guerra do Ópio e a Presença Britânica Na China No (Guia Do) Panorama Description of a View of Macao (1840), de Robert Burford]