Toan Tap Thien Nam Tu Chi Lo Do Thu by Do BaThis is an atlas of Vietnam drawn by Do Ba in the 17th century. In the map of Quang Ngai district, there are the following notes: “An elongated sandbook lies in mid sea known as the Golden Sandbank”, “every year by the last month of winter, the Nguyens would send there a fleet of 18 boats to retrieve ship-wrecked cargos….” Map of “Route Through Quang Nam” (Le Dynasty in the 17th century) drawn by M.G. Dum...