REMOVE

1. Indian Ocean
2. Vietnam
3. Strait of Malacca
4. Hainan Sheng (China)
5. Ceylon
6. Sumatra (Indonesia)

WHAT

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

WHERE

1. Andaman Sea (1)
2. Bay of Bengal (1)
3. Cambodia (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. Paracel Islands (1)
11. Philippines (1)
12. South China Sea (1)
13. Sri Lanka (1)
14. Sumatra (Indonesia) (1)
15. Taiwan (1)
16. Thailand (1)

WHEN

1. 1787 (1)