19TH CENTURYThe vibrantly painted rectangular panel depicting foreign factories, with the flags of France, America, Britain and Denmark, the foreground with six vessels travelling downstream on the Pearl river, two are flying red and gold banners, contained in a wood frame, 9cm x 13.1cm.Cf. Christie's, London, 6th November 2003, lot 720 for a similar reverse glass painting of the Hongs of Canton.