Siam Thailand Bay of Tonquin Nautical Soundings 1751 Bellin charming mapCarte du Cours de la Riviere de Tunquin (Old Maps, 18th Century Maps, Asia, Southeast Asia, Siam, Thailand, Bay of Tonquin, Cacho). Issued 1751, Paris by Bellin. Mid 18th century engraved map, with lovely hand color. Nice looking example, pleasing age patina, any minor age flaws easy to overlook or forgive. Sheet Measures c. 9 7 8" H x 7 1 8" W. Engraved Area Measures c. 8 1 8" H x 5 5 8" W. Cartographic Reference(s): Tooley's Dictionary of Mapmakers,