REMOVE

1. Indian Ocean
2. Vietnam
3. Sri Lanka
4. Bay of Bengal
5. Paracel Islands
6. Sumatra (Indonesia)

WHAT

1. Manuscripts (1)
2. Sea Charts (1)

WHERE

1. Andaman Sea (1)
2. Cambodia (1)
3. Ceylon (1)
4. China (1)
5. Gulf of Tonkin (1)
6. Hainan Sheng (China) (1)
7. Macao (China) (1)
8. Malacca (Malacca, Malaysi … (1)
9. Myanmar (1)
10. Philippines (1)
11. South China Sea (1)
12. Strait of Malacca (1)
13. Sumatra (Indonesia) (1)
14. Taiwan (1)
15. Thailand (1)

WHEN

1. 1787 (1)